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Does repairing a mac disc with disc utility erase the hard drive (outside of damaged files)?

I think I have to repair my disc though disc utilities / first aid, but I'm wondering if this will erase my hard drive (I have the most important files backed up, but not everything; I know that if a file is damaged then it will be gone anyways. I just want to know if using disc utilities / first aid erases the hard drive).

MacBook Pro 13″, macOS 10.12

Posted on Nov 11, 2021 4:26 AM

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Posted on Nov 11, 2021 5:37 AM

thibaultj-p wrote:

I think I have to repair my disc though disc utilities / first aid, but I'm wondering if this will erase my hard drive (I have the most important files backed up, but not everything; I know that if a file is damaged then it will be gone anyways. I just want to know if using disc utilities / first aid erases the hard drive).


Running DiskUtilitiy— First Aid does not erase anything. Full stop.


Boot into Internet Recovery (Option Command R) and from the dropdown menu: Utilities>  Disk Utility> run the First Aid on your Macintosh HD (and the "Macintosh HD-Data" volume as well if Catalina/Big Sur/Monterey) If errors are found and repaired, run again until no errors reported.


Disk Utility>View>Show All Devices The best sequence is —

• Volume level

• Container level

• Parent drive


Recovery (both M1 and Intel) — https://support.apple.com/en-us/HT204904


https://support.apple.com/guide/mac-help/use-macos-recovery-on-an-intel-based-mac-mchl338cf9a8/mac


1 reply
Question marked as Top-ranking reply

Nov 11, 2021 5:37 AM in response to thibaultj-p

thibaultj-p wrote:

I think I have to repair my disc though disc utilities / first aid, but I'm wondering if this will erase my hard drive (I have the most important files backed up, but not everything; I know that if a file is damaged then it will be gone anyways. I just want to know if using disc utilities / first aid erases the hard drive).


Running DiskUtilitiy— First Aid does not erase anything. Full stop.


Boot into Internet Recovery (Option Command R) and from the dropdown menu: Utilities>  Disk Utility> run the First Aid on your Macintosh HD (and the "Macintosh HD-Data" volume as well if Catalina/Big Sur/Monterey) If errors are found and repaired, run again until no errors reported.


Disk Utility>View>Show All Devices The best sequence is —

• Volume level

• Container level

• Parent drive


Recovery (both M1 and Intel) — https://support.apple.com/en-us/HT204904


https://support.apple.com/guide/mac-help/use-macos-recovery-on-an-intel-based-mac-mchl338cf9a8/mac


Does repairing a mac disc with disc utility erase the hard drive (outside of damaged files)?

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