You may not install to this volume because it has damaged core storage users " Needless to say, this has caused other operational issues and needs to be corrected. app/ Press enter, you may have to enter your admin password This will delete the app, now you need to re-download and install Catalina. Posted on Jul 27, 2020 6:07 AM Best reply User profile for user: HWTech HWTech Level 9 55,098 points Posted on Jul 27, 2020 7:15 PM Oct 1, 2019 · If you need a storage solution to handle your backups, Other World Computing has a large selection of storage options you can choose from. Obviously, you’ll want to get the currently logged-in user into a Jan 25, 2022 · macOS Monterey update When I try to install macOS Monterey, I get this message: you may not install to this volume because your home directory is in an incompatible location. How do I fix this? Go into >systems preferences>security&privacy>FileVault "Some users not authorized" checked the box to authorize user. Aug 5, 2025 · Erase the drive and reinstall macOS In case the above methods don't work to fix the volume currently being encrypted issue while installing macOS, the last method you can try is to erase the Macintosh HD and reinstall macOS. I did install a CC trial about six month back but have since uninstalled it. But before that, make sure you reformat your external SSD as APFS in disk utility first! APFS option is available now since it was missing the first time you formatted your hard drive to install El Capitan. Mar 27, 2024 · Can't Update iMac Due To "Missing Firmware Partition" I am currently using a Late 2012 21. Dive into this comprehensive guide to understand the underlying causes, discover effective solutions, and find answers to common questions surrounding this issue. If the encryption status of any volume or partition is No, launch Finder. _ "Custom boot args were not allowed. You can not change state again until is has completed, and it can NOT be cancelled. How do I fix this issue? Nov 13, 2020 · I had exactly the same problem and in the end chose to clean install to non-encrypted APFS. Sep 25, 2017 · This thread has been closed by the system or the community team. 15 Catalina, Apple split the startup disk into two separate volumes, Macintosh HD and Macintosh HD - Data. May 13, 2022 · It won’t let you install to it. 1, and Jun 15, 2018 · If you try to upgrade to High Sierra (macOS 10. This time it will show you an option to re-install Big Sur. 1 day ago · A non-exclusive easement lets multiple people use the same piece of land for a specific purpose. Oct 28, 2018 · I understand that you are not able to install macOS Mojave, getting an error message referencing "damaged Core Storage users". I have also tried the Creative Cloud Cleanup tool as suggested in a related forum thread and that also did not work. Revive or restore Mac firmware (If you just used Disk Utility to erase your startup disk, it’s not necessary to also repair it. Any ideas? (Mac has always worked!!) Study with Quizlet and memorize flashcards containing terms like backup, volume, firewall and more. 3 days ago · This guide will explain what 'This Volume is Not Formatted as APFS' mean and provide methods to fix this issue on Mac computers. I had to format it with diskutil from the terminal, the graphical disk utility was not progressing. I keep seeing that you have to wait for it to finish encrypting, then disable it, but since I can't log in to my profile there's no way for me to do that. I went through the Apple Support App - Chose Installations & Updates and hit “Talk to us now” (saves you from having to talk to the robot) It doesn’t matter if your Mac is out of warranty. I've redownloaded the installer in system preferences > software update multiple times I cut off the firewall in my antivirus I've uninstalled my antivirus I've tried downloading and updating in safe mode I've tried changing the date to the release date of Ventura I downloaded the Mojave update for my Mac Air, after attempting to install I got this warning " Unable to install damaged core storage users". It says you may not install to this volume because it is part of an AppleRAID. Dec 6, 2019 · When i try to upgrade to Catalina from Mojave, the error message showing as "you may not install to this volume because your home directory is in incompatible Mac users may encounter the error message 'You may not install to this volume because it is currently being encrypted. Can not install on this volume because it is part of a AppleRaid Aug 22, 2021 · Tried to install official macOS High Sierra 10. Sep 24, 2018 · Damage core storage users Hello, I am trying to install MacOS Mojave on my 2016 MacBook Pro No Touch Bar, but it is not allowing me to select a disk to install it on and it says I cannot install it as it has damaged Core Storage users. You would need to revert the CoreStorage volume wrapper that contains HFS+ back to a straight HFS+ volume to regain read-only access. One thing you can do is to repair the disk and see if the issue persists. Apr 23, 2022 · I have a Macbook Pro, 13 inch mid 2012 on which I'm doing a clean install on an external SSD. I am working on a mid 2012 Macbook pro retina (10,1) model. Need to know my options are. Jan 3, 2016 · I have the same problem and cannot find a solution anywhere online. 5 no issues. you can re Oct 24, 2019 · The easiest way to resolve the “This copy of the Install macOS . app application is damaged, and can’t be used to install macOS. Reserve at Publicstorage. Did you originally install using UniBeast/Multibeast? If so, you should look into a re-install with a clean vanilla install to avoid these crazy issues. Unlike an exclusive easement (where only one person can use it), a non-exclusive easement means many property owners or companies can access that land at the same time. I have a 2009 MacBook which I'm trying to factory reset/re-install. Overviewjump to: Workarounds Unable to start: Cannot start because game data is missing or damaged. ” is to re-download the installer again from Apple, which contains a new fresh certificate that is not expired. Find the right size storage unit for your needs. 15. I was able to install Mountain Lion which I have upgraded to Sierra 10. In this article, we’ll explore the common reasons why your Samsung device may not be updating and provide you with step-by-step solutions to resolve the issue. " When I try to update to Mojave - I get - "You may not install to this volume because it has damaged core storage users" - any advice? MacBook Air 13", macOS 10. I too have this error (You may not install to this volume because it has legacy FileVault users) when trying to install High Sierra. _ ËœYou must provide authorization for this volume by setting it as your startup disk. Are you frustrated with your Samsung device not updating? You’re not alone. Side note. You can now 3 days ago · What do you think about this list? Share your opinion on social media! In the following sections, we will talk about practical solutions to fix macOS Big Sur problems. 13) and get You may not install this volume because the computer is missing a firmware partition when trying to select your drive to upgrade, it may be because you’re upgrading on an OWC drive. Try removing installinfo. I get message It may not instal this volume as it has damaged core storage users? I need to download iMovie but this won't work until I download Big Sur. As we say goodbye to iTunes, macOS Catalina brings in new apps Recently bought a Mac Pro 2013 for cheap ($370), The CPU is fast enough for my work, memory is decent size and quad channel already, but the storage is on slow and small side. . Jun 5, 2015 · At first I reinstalled the old Aura SSD but I couldn't install High Sierra on it, "This disk is locked". Ran disk utility and disk looks ok. I've been trying to update from Catalina 10. Let's get started. I've explored the AppData\Local\Adobe\OOBE\PDapp\ file directories, but Aug 9, 2020 · HI, my Mac Book Pro 13' has decided it will not let me boot in & then when i do i can not install macOs (you may not install to this volume because it is not mounted) i have no idea where to go from here & ready to throw it at the wall. If you shut down your Mac, it will resume after you start up again. I have a 4,1 -> 5,1 Mac Pro with an RX 580 and I wanted a fresh install of Mojave on a new SSD. I tried to reinstall macOS High Sierra but was unable to, as it showed the following screen Oct 4, 2018 · When the firmware partition is messed with (ifi) its an attack to make it appear as if your components ( mother board, video card, wifi, bt are breaking down, obsolete etc, dont fall for it, test the parts your self, its all software and a scam to extort users i to buying a new mac/device or simply to bringing their computers to apple scam store and trust them with their data…. Btw I had previously installed it in the same machine with Sep 8, 2020 · Since it is going to install Mojave, you may want to erase it a Mac OS Extended (Journaled), then let it try to install Mojave. Nov 26, 2019 · can't install Catalina, says "you may not install to this volume because it is currently being encrypted" what now? Sep 25, 2025 · This post provides fixes for the error message you may not install to this volume because the computer is missing a firmware partition so that you can successfully See if this helps: Damage core storage users This thread has been closed by the system or the community team. 13. It sounds like you’re receiving a message regarding your home directory being an incompatible location. 2 whose SSD died. This thread has been closed by the system or the community team. Jan 24, 2018 · Reinstalling macOs: you may not install to this volume because it is currently being encrypted Hello Guys, I updated my Macbook Air and was unable to load the system for next session. " is a hardware or software issue Technician's Assistant: How long has this been going on with your MacBook Pro? What have you tried so far? Customer: Not sure how long this has been going on, just noticed it today. We have an expert-written solution to this problem! If you plan to have multiple users access a system, you can create a ____ partition, which is the home directory for all users' directories. Booted to Windows, CoreStorage volumes cannot be mounted and consequently the contained files can't be read - until now. Jun 15, 2020 · Not sure why im getting this when selecting the hd to install. I would call Apple Support right now. 6) Posted on Sep 24, 2018 11:12 PM Dec 11, 2018 · I tried to install macOS Mojave after being prompted to install it but received the following message when trying to install it "You may not install to this volume because it has damaged Core Storage users. Nov 9, 2018 · 3 month old Mac Mini trying to install Mohave, the installer runs until I get to the disk selection and I get the error: There are no firmware updates that I can find. ” anybody encounter and solve similar issue? Discount Code (PCTIPSPRO) Are you trying to install/ Update your MAC Operating System to macOS Big Sur but says "you may not install to this volume because it is currently being encrypted"? As the title says, ‘This volume is not supported core storage configuration’ error - when trying to update from high sierra to Catalina. See full list on iboysoft. So I checked the list of compatible SSDs for upgrade, I found my spare HP EX950 2T SSD was in the list, I only need to buy a nvme to Apple adapter: Bought a nvme to apple adapter, and Thermalright SSD heatsink i'm unable to install because the volume has "damaged Core Storage Users". Oct 10, 2023 · sudo rm -r /Applications/Install\ macOS\ Catalina. 13 Jan 30, 2021 · I have a 2016 MacBook Pro with 1T of storage. They will still offer support on a software level. With backups out of the way, let’s take a look at some of the common and not-so-common macOS Catalina installation issues you may run into: macOS Catalina Won’t Install Apparently my Mac HD has damaged core storage users so I can't install Mojave. First as HFS+ Encrypted, and the last several years as APFS Encrypted. Running commands as a user when scripting for Munki or Jamf Munki and Jamf run as root, so scripts they execute execute as root, not user. 5" SSD after formatting it to GUID, I get the error "You may not install to this volume because the computer is missing a firmware partition. _ 4Failed to find required installer information (SFR). I had been running Mojave for a couple of years and was already running the latest firmware. What can I do? MacBook Pro TouchBar and Touch ID, macOS High Sierra (10. It is necessary to create a volume first, to be able to install the applications on it. Then install macOS If that doesn’t work, you may have a hardware issue and need to Feb 13, 2023 · What is the meaning of "You may not install to this volume because the computer is missing a firmware partition" when trying to install macOS to an external USB drive since the internal flash stopped working? Aug 5, 2025 · Erase the drive and reinstall macOS In case the above methods don't work to fix the volume currently being encrypted issue while installing macOS, the last method you can try is to erase the Macintosh HD and reinstall macOS. So this is just a Oct 30, 2023 · The 2nd partition is in macOS Journaled format, and when I try to install to it I get an error: "You may not install to this volume because the computer is missing a firmware partition". Any ideas how to force install? Booted from usb drive and trying to install on RAID where it is running high sierra (installed via dosdude highsierra patcher) you may not install to this volume because it is currently being decrypted i just got my macbook pro 2017 and i was trynna update from high sierra to catalina when it said you may not install to this volume because it is currently being decrypted can you all tell me how to fix 1 3 Share Add a Comment Sort by: Apr 18, 2021 · I am getting the message "You may not install to this volume because the computer is missing a firmware partition" when I try to install Big Sur on an external SSD to run on my M1, 2020 Mac mini 16GB RAM. Hey, I just wanted to ask if some of you have the same issue with installing Big Sur? The specific message is „You may not install to this volume because it has a disk password“. It seems to rapidly switch the drive to encrypted. I had Cat installed and working on the drive. If the disk fails these, it may need to be erased and reformatted APFS and for the installation to include transfer of your user data from your Time Machine or other backup What can be done about a message (damaged Core Storage Users) when trying to install Big Sur OS? Unfortunately, it looks like the only way you're going to be able to get around this bug is to erase your computer and then install the desired version of macOS. You may vote for any posts you find helpful, or search the Community for additional answers. The exact error message from the installation utility is "You may not install to this volume because it is part of a AppleRAID. Oct 10, 2019 · Hi Kangaloop , Thanks for using Apple Support Communities. I am using a late 2013 iMac 21. [Re-Titled by Moderator] why does the new update bring up a box saying you may not install to this volume because it has damaged core storage users. I can't update from Yosemite to High Sierra cause I got stuck on the screen where it says… Sep 25, 2017 · There are no replies. In the dock, click the Finder icon and then in the left panel under Devices, click your computer name. Many Samsung users face this issue, and it can be caused by a variety of factors. Mojave Support Community Sep 2, 2018 · I have the following error: "You may not install this volume because the computer is missing a firmware partition" I am trying to install High Sierra. 6. dean Support Community I’m trying to update to macOS Big Sur, but when selecting a disk, it says, “you may not install to this volume because it is currently being encrypted. Then I got another error: "macOS High Sierra cannot be installed because the third-party storage installed in your Mac is not compatible". 15 Posted on Feb 4, 2024 6:47 AM May 13, 2022 · It won’t let you install to it. It was still running Mountain Lion at the time, and since then I've been booting off an external HDD (Mountain Lion updated to Sierra) 2 days ago · Is your Google Pixel phone stuck in a frustrating restart loop? You’re not alone. Feb 4, 2024 · trying to instal Monterey but says " you may not install to this volume because it is currently being encrypted MacBook Air 13″, macOS 10. " Oct 14, 2019 · Get message from installer that "You may not install this volume because the computer is missing a firmware partition. I'm surprised Apple doesn't have KB Oct 14, 2019 · Get message from installer that "You may not install this volume because the computer is missing a firmware partition. Nov 1, 2018 · Based on what you stated, it seems like you are not able to install macOS Mojave because the volume is damaged. If you have Mods installed please remove them and - 11819181 This thread has been closed by the system or the community team. ” anybody encounter and solve similar issue? 1 day ago · This applies to a growing number of consumer models nowadays. Revive or restore Mac firmware You may have to expand the window to display all the information. com today! Jan 22, 2021 · "you may not install to this volume because the computer is missing a firmware partition". Dec 11, 2020 · If the NAS has just been initialized, but you have not configured a storage space yet, then you cannot install any applications. This will erase all drive data, therefore you should first backup the Mac with Time Machine or other methods you prefer, and then proceed to format the Mac hard drive and Update 2021-03-25: "Solution" posted below! My Hack (original Mojave success thread) has been running well for about a year on Catalina, but some disk corruption issues cropped up, and I decided to do a fresh install. What do I do? Feb 3, 2018 · Apple Intelligence has also begun language expansion with localized English support for Australia, Canada, Ireland, New Zealand, South Africa, and the U. com Sep 17, 2025 · In conclusion, encountering the error message "You may not install to this volume because it is currently being encrypted" on your Mac can be frustrating. I find that Disk Utility Aug 5, 2025 · When trying to install or upgrade to macOS Ventura, Monterey, or Big Sur, you may receive the error message saying, " Installation cannot proceed because the installer is damaged. Mar 13, 2015 · Instead of a default/classical Mac volume like your iMac, your MacBook Pro contains a CoreStorage volume. To fix a Google Pixel that keeps restarting, you should first try basic solutions like holding the power button for 30 seconds, booting into Safe Mode to identify . May 22, 2014 · For many years I have formatted my system/boot hard drive as an encrypted drive. Jun 7, 2021 · The last message i received said "You may not install this volume, because the computer is missing a firmware partition" what to do? Is the hardrive corrupt or destroyed? or is there a fix? Sep 22, 2024 · Error Message 'You may not install to this volume because the computer is missing a firmware partition' My Late 2015 iMac 17,1’s internal SSD failed and no longer shows up in Disk Utility. Oct 8, 2023 · the computer that is receiving the installation does not have a system on it (it has been wiped completely), when I boot the computer I cannot point it to boot off the other machine that is in TDM that has the installation, it boots to Internet Recovery automatically. Let's have you open the FileVault tab of the Security & Preferences pane within System Preferences on your Mac. It appears that there is a way to prepare a USB drive for Windows 10 to install, but it’s not exactly something that is easy to do. Data issues in macOS 11 software update Since macOS 10. Sep 24, 2018 · Unable to Install macOS Mojave, "damaged Core Storage Users". " Jul 15, 2018 · Help! Im trying to install it on a mac pro 3,1 the creation of the usb installer went all ok without errors but after boot I get the message (This copy of install macOS Catalina application is damaged, and can’t be used to install macOS. Jun 30, 2007 · I'm trying to install MacOS Mojave on my late 2014 iMac with SSD and I keep getting the error message: "This volume is not a supported Core Storage configuration. But it refuses to download. i'm unable to install because the volume has "damaged Core Storage Users". I want to be able to distribute macOS to mu Public Storage offers self-storage units in thousands of facilities near you. There are certain security policies governing Pluton-equipped "Secured-core PCs" that may further complicate Linux installation. Is this maybe the problem? What files from Dec 6, 2019 · When i try to upgrade to Catalina from Mojave, the error message showing as "you may not install to this volume because your home directory is in incompatible Mac users may encounter the error message 'You may not install to this volume because it is currently being encrypted. " Under Sharing & Permissions, disk info announces, "You can only read. Later during setup if you choose custom setup instead of quick setup the option to turn on FileVault is given. Mine now looks like this in Disk Utility. When I try to install Catalina on my 2. Jul 1, 2020 · I am trying to install OS Catalina but I keep getting the message "you may not install to this volume because your home directory is in incompatible location, please log in to another user to change its location. Sep 24, 2018 · Hello, I am trying to install MacOS Mojave on my 2016 MacBook Pro No Touch Bar, but it is not allowing me to select a disk to install it on and it says I cannot install it as it has damaged Core Storage users. Nov 13, 2020 · There was a problem with pre-encrypted volumes in earlier OS's, in that the User Account was not able to put the information into the Keychain and users needed to enter the encryption code every time they booted. Revive or restore Mac firmware Sep 12, 2025 · Here's how to fix the Storage system verify or repair failed issue when updating macOS to the latest version. Here is how: Open Terminal and enter the followign command and press enter: Feb 13, 2021 · I downloaded the macOS Big Sur for my MacBook Pro I bought used and when it comes to installing it I get a pop up that says “you may not install to this volume because it is currently being encrypted “. Federal law treats non-exclusive easements as property rights that let people cross, build […] Mar 25, 2022 · And it only makes progress while your Mac is awake and not exceptionally busy. 5inch. Simply click the Upgrade Now button. It is a SATA drive. 15 Posted on Feb 4, 2024 6:47 AM Aug 5, 2025 · Some Mac users encounter this popup saying "You may not install to this volume because it has a disk password" when trying to install macOS on a volume with APFS (Encrypted) as the Format. I am attempting to upgrade from Lightroom 5 to Lightroom 6. " Feb 29, 2024 · Facing the "You May Not Install to This Volume" error message can halt your installation process. 12. Ive tried both apple format with partition man and os extended jornal with partition map get the same result. And SUPER slow. However, now if you first format a drive as APFS Encrypted and try to use the Big Sur (latest 11. However, you can overcome this issue by understanding the reasons behind the encryption process and following the appropriate solutions. Tried to reboot, reinstall various times but with no success. Trying to install latest OS on an Air. MYou may not install to this volume because it has damaged Core Storage users. any insight would be appreciated! Sep 30, 2018 · Non-retina 2012 MBP That link explains SOME things for but the Firmware Utility zip file doesn't even unzip correctly for me so I can not continue with the install process and I don't know if that is because of my computer or if it's in BETA form but I'm at a lost again. I can't install because it says my computer has damage in its files. ' when trying to install an operating system or software. 3. Jan 19, 2022 · Recently, out of the blue, my internal boot drive (a 120GB SSD formatted APFS) decided it was read only, and withdrew priveleges from all but "system [Read & Write]," "wheel [Read only]," and "everyone [Read only]. I get cannot connect to the App Store. I would like to clean my machine and want to know is CleanMyMac X worth buying and using and will it make it so I can install Mojave? I am getting the error message that "you may not install to this volume because it has damaged Core Storage uses. ” I tried looking up on google to fix this issue, and I found I either have to let the encryption in FileVault finish or turn off FileVault/encryption. The following article provides steps that should be helpful: Resolve issues caused by changing the permissions of items in your home folder - Apple Support Take care. Best Regards Spyros MacBook Pro TouchBar and Touch ID, macOS Mojave Sep 9, 2021 · After installing El Capitan on your external SSD, you have to restart and run macOS Recovery over the internet AGAIN. It won't install due to "damaged core storage. plist. I have a USB bootdisk but sadly holding option to boot from USB doesn't work - I don't believe these models support it (A1342). Jan 25, 2022 · macOS Monterey update When I try to install macOS Monterey, I get this message: you may not install to this volume because your home directory is in an incompatible location. ) If you’re using a previously downloaded installer that your Mac says is damaged or can’t be verified, delete it and download the installer from Apple after repairing your disk. 7 for the last few days and no matter what i try it always says the file is damaged. What can I do? May 6, 2020 · So I tried to reinstall the OS in recovery mode and now I'm getting "you may not install to this volume because it is currently being encrypted. Oct 22, 2018 · When trying to install the update Mojave for Mac, I run into the problem of "unable to install this volume because it has damaged core storage users" Feb 2, 2018 · I don't have a sonos installed but got this popup "you may not install to this volume because it has legacy filevault users. The fun part is that I never installed any Sonos application. K. Use Disk Utility when you are to the “install” screen - delete all the volumes - especially if you have more than one that says “Data” Then Erase the entire drive - leave Untitled as the title. It makes data backup with third-party apps Jun 26, 2010 · Hello everyone, Just in case anyone runs into this error, I wanted to document it. 6) Aug 28, 2023 · Apple’s latest macOS, Catalina, has just been released to the public last October 7, 2019 and you can now install it on your Mac, as long as your device meets the hardware requirements. You may not install to this volume because it has damaged core storage users. You need to select the Apple SSD… and choose Mac OS Extended (Journaled). Jan 14, 2019 · I understand you're unable to update macOS, as you receive an alert mentioning damaged Core Storage users. Show more Update 2021-03-25: "Solution" posted below! My Hack (original Mojave success thread) has been running well for about a year on Catalina, but some disk corruption issues cropped up, and I decided to do a fresh install. Your Mac is remarkably clever, and can do MOST (but not all) operations with the drive half-encypted. However Mac OS X, doesn’t suffer this limitation and will let you install to whatever you want, so I install Mavericks to the 16GB drive, and yeah it’s booting. 5 Inch iMac, running macOS Sierra using an external SSD plugged in by USB. This is when I'm trying to install to my internal SSD (my current and normal boot drive). All worked well up through Catalina. Hold Option-Command-R at start. Oct 20, 2018 · Hi Getting error while upgrading to Mojave "unable to install due to a damaged core user storage" i did check disk using utilities and found no issue I rebooted my Have a 2013 Macbook Air 6. Just replaced my hard drive, installed OS X 10. 13+ because the bundled system firmware updater will fail because the macOS installer/system firmware updater requires a properly partitioned and formatted internal drive. First revealed during the WWDC 2019 conference in San Jose, California, macOS Catalina introduces some new exciting features and functionalities. Many Pixel users face this common but disruptive issue that can interrupt your day and prevent access to important information on your device. " I'm stucked in the same situation, FileVault seems is locking the HD and doesn't decrypt the disk, i can't disable also FileVault. Apart from above computer seems to run without any problem. 6 (17G66) form MAS and get "You may not install to this volume because the computer is missing a firmware partition. So Filevault was the preferred method. Jun 26, 2010 · Hello everyone, Just in case anyone runs into this error, I wanted to document it. This is because the internal hard drive the Mac originally came with has failed (sometime around 2016), and so it is not recognised. It’s impossible to install Linux if you can't rearrange the boot order and place the USB first, or if you can't access the boot menu. (If you just used Disk Utility to erase your startup disk, it’s not necessary to also repair it. This will erase all drive data, therefore you should first backup the Mac with Time Machine or other methods you prefer, and then proceed to format the Mac hard drive and I was updating the iOS with Mojave and this message came up when a location disk had to be chosen. Check the encryption status for each additional partition or volume. Using opencore legacy patcher. looking to bring everything up to date and it's giving me this error. " After 4 days searching, here is how I fixed that and installed high Sierra. I have a couple of suggestions for this issue. " What now? This all started because I couldn't install Zoom app because Air didn't have latest OS. One great way around this is to use Outset‘s login scripts (login-once, login-every), but sometimes you may have occasion to actually run a script immediately as the logged-in user. Apr 27, 2020 · Do you have a working internal drive properly partitioned and formatted for use by macOS? If not, then you cannot install macOS 10. Any advise whould be highly appreciated. Aug 5, 2020 · When you power it off, I would attempt a second time to do an erase install. " It is a software RAID done through Disk Utility on a MacBook Pro 9,2 with 2x Crucial MX300 275GB SSDs. Feb 18, 2021 · I have a MacBook Pro early 2015 running macOS Big Sur and am trying to use startosinstall to install macOS Catalina or High Sierra onto an external SSD. 8.