SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/aplus-mac-first-aid

Which Disk Utility feature checks and repairs a Mac volume?

First Aid checks and repairs disks.

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  1. Erase
  2. First Aid ✔
  3. Partition

Why: In Disk Utility you run First Aid on each volume and container, then the storage device itself. If it says the disk is about to fail, back up your data and replace the disk.

Huh, didn't know that: Disk Utility cannot detect or repair every problem a disk may have.

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A byte walks into a bar looking miserable. The bartender asks what's wrong. 'Parity error.' 'Ah, I thought you looked a bit off.'
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References

Answer: First Aid. In Disk Utility you run First Aid on each volume and container, then the storage device itself. If it says the disk is about to fail, back up your data and replace the disk.

  1. Repair a storage device in Disk Utility, Apple Support support.apple.com/guide/disk-utility/repair-a-storage-device-dskutl1040/mac
    you need to run First Aid on each volume and container on the storage device in turn
    Checked 2026-10-10.

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