Linked Questions

1 vote
1 answer
4k views

CoreStorage Volume not detected

I had a Linux/OS X 10.11 dual boot configuration and wanted to remove the Linux partitions. I managed to remove them without any issue but when trying to merge the free space with the OS X partition ...
tutzeroone's user avatar
1 vote
1 answer
2k views

How to fix CoreStorage not mounting? Broken GPT, GUID, volume etc?

I have an external hard drive with two partitions, each one formatted as "OS X Extended (Journaled, Encrypted)". The second partition mounts and asks for a password, but the first one does not. The ...
AGG's user avatar
  • 11
1 vote
1 answer
1k views

How to reinstall macOS with internet recovery with a fusion drive? No drive is available

This is continuation from my previous question "I installed Xubuntu without installing rEFind. Is it safe to remove the Linux partition at this point?", where I now have removed the Linux ...
Alfie Stoppani's user avatar
1 vote
1 answer
976 views

Partition showing as 'FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFF'; attempted to fix it but made it worse

MacBook Pro 2015. I recently dual-booted my Mac with Linux for school however I changed my mind on which distro to run and figured the best way to change would be to format and remove the Linux ...
AceHyte's user avatar
  • 11
2 votes
1 answer
803 views

Unable to boot into macOS or Ubuntu after dd and partition reduction

I am on an early 2015 MacBook Pro with macOS Sierra, dual boot with Ubuntu 16.04. In macOS, I did dd if=/dev/disk1s3 of=disk2s2(if i remember correctly). It succeeded and I proceeded to shrink the ...
EraserPencil's user avatar
2 votes
1 answer
734 views

Cannot boot macOS after installing Ubuntu on dual-boot Boot Camp Windows

While installing Ubuntu on my MacBook Pro 2015, which already has Windows and macOS installed, I made a huge mistake by selecting the "install alongside Windows" option. As a result, I can ...
Richard Y.'s user avatar
0 votes
1 answer
712 views

Does "gpt remove" command delete files along with partition? Trying to recover a Mac OS partition Vol Type FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF

I have a Macbook Pro with Big Sur on it, and I installed Linux Mint. I then resized the encrypted Mac OS APFS partition in order to grant Linux more space. After that I created another smaller Linux ...
SH10151's user avatar
  • 113
0 votes
1 answer
648 views

Reviving unmountable & unformattable usb drive

I have a USB drive, which was a bootable Windows drive, which I seldom used. Recently I tried to format it, and it went corrupted (I hope). I'd like to find out if it's broken or not. I'd tried to ...
Mutlu's user avatar
  • 21
1 vote
0 answers
617 views

Mac fails to boot - Partition map check failed because no slices were found on main drive

So my girlfriend's Mac Pro (Mid 2012, Catalina, SANDISK Ultra 3D SSD 512GB as boot drive) suddenly gave in today. On boot it would only display the directory symbol with a question mark within. ...
Anarc's user avatar
  • 11
1 vote
0 answers
515 views

EFI missing, Question folder appears, Mac SSD appears and disappears, what do I do?

Setup Macbook Pro retina 13 A1502, SSD 128Gb Running Yosemite, but currently doing the update for high sierra. Problem: Question marked folder appear after I left it for 2 days, battery run out (left ...
Rennoracle's user avatar
0 votes
2 answers
511 views

Can I recover boot camp partition after removing it with gpt remove?

My old MacBook Pro, A1286, (15in, mid-2012) has an SSD that divided my main boot disk into two partitions, one for Mac OSX (running 10.13, High Sierra) and one for Boot camp (running Windows 10). The ...
plapke's user avatar
  • 1
0 votes
0 answers
314 views

Mac M1 Sonoma: Cannot read my 256Gb Micro SD card

I have a brand new 256Gb SanDisk Micro SD card and I'm not being able to read/use in my Mac through the internal SD Card reader slot (I don't have an external card reader to try this option). The card ...
Krueger31's user avatar
0 votes
0 answers
137 views

MacOs Filesystem damaged attempts to recover my data

So this is my situation: Before to have the problem my mac had 2 main partitions, on the first one there was installed osx and on the second one linux. Yesterday I did cmd+r but in the while, the ...
Virgula's user avatar
  • 123