I figured I'd put it up here and see if anyone has any insight, so here's the scoop.If you plan on using the drive for Mac only then you will want to erase the disk. Checked the primary HDD via Disk Utility.We recently started using Jamf in our school district and ran into a very weird issue recently that quite frankly I can't explain and a couple hours scouring the internet was of little to no help. Asks me to restart and back to normal login. When trying to install High Sierra, system takes me to a screen that says 'unable to unmount volume for repair'. Sierra was installed over the previous version of OS. Third party SSD running Sierra for more than a year.Looks like it starts erasing, but then quits and says at least one volume could not be unmounted. Tried every single thing above. Couldn’t repair, said to reformat, but couldn’t erase anything either.Since she could not get in from there she brought it to me.Mac Unsolved. Instead, the local administrator account appeared there with a space for the password. When it came back up, the usual "Username/Password" login screen was not there. The teacher was having trouble connecting to the wifi and restarted the machine. Both reports and subsequent symptoms were identical. Can't confirm exact timing but they were within a day of each other for sure.
![]() Could Not Unmount For Repair Install High SierraBooting to recovery mode shows the "Macintosh HD" as unmountable. No am I able to get to our "Admin" user login because it's at the FileVault login window (not the OS login window). But her password (and she's 100% confident that she's typing it correctly) does not work. User says she was trying to run the latest security update, and upon restart, we were presented with what appears to be a FileVault login window with her username listed. Thanks!I saw this yesterday on a 2018 MacBook Air running 10.14.6. Any help with that would be much appreciated as I feel it could prevent this issue in the future. Mac os x el capitan on amd pc 2017User insists she's using her account password to authenticate, but it doesn't work. User is locked out of her system by what appears to be FileVault, but FV wasn't enabled, and while it's enrolled in our JSS, there is no institutional or personal recovery key set (because FV was never enabled!). Also, when I "Get Info" on the volume while booted from Recovery or from the Tools Drive (click on the little "I" button in the top right corner of Disk Utility), it says that the volume is not encrypted.So, I'm at a total loss here. Only our faculty are allowed to enable FileVault and this was a student. The super curious thing is that FIleVault was NOT ENABLED for this user.
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