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fsck_apfs

What to do when APFS has problems

First Aid in Disk Utility, or running fsck_apfs in Terminal, return warnings or errors on one of your Mac’s volumes. Here’s what to do next.

October 7, 2025 Macs, Technology

When and how should you run First Aid in Disk Utility?

Should you run First Aid on your Data volume before updating macOS, or as routine housekeeping? And how should you run it?

June 17, 2025 Macs, Technology

Last Week on My Mac: Giving a fsck

What disk checks are made in Safe mode? How are they different from those run during normal startup? If Disk Utility is to be our only APFS repair tool, shouldn’t have more and better features?

March 23, 2025 Macs, Technology

Dual-booting your Mac with multiple versions of APFS

What if you want to boot your Mac using two or more different versions of macOS, with different versions of APFS? Here’s how to avoid problems.

August 22, 2024 Macs, Technology

APFS: Command tools

This reference covers fsck_apfs, diskutil information, diskutil apfs, conversion of HFS+ to APFS, mount_apfs, and newfs_apfs.

April 22, 2024 Macs, Technology

Last Week on My Mac: Is APFS running into trouble?

Two problems undermine Disk Utility’s First Aid: it persisting bug in failing to unmount volumes to check and repair, and its default omission of containers. And errors in APFS seem to be on the rise.

October 15, 2023 Macs, Technology

How to check and repair storage in Disk Utility

How to use First Aid in Disk Utility to check and repair APFS storage, whether it’s part of your boot disk, or general storage.

October 10, 2023 Macs, Technology

What to do with common APFS warnings and errors

When you’ve worked out which files or folders are causing errors in APFS, what can you do to ensure they don’t recur?

August 31, 2023 Macs, Technology

What to do with a disk error?

Disk errors threaten your data: how to detect them, how to use First Aid in Disk Utility, how to use fsck, and what to do with the disk afterward.

June 19, 2023 Macs, Technology

Close, but still no banana: Disk Utility 22.6

Disk Utility version 22.6 in Ventura 13.4 finally tackles bugs running First Aid on APFS volumes. Has it finally solved them?

May 22, 2023 Macs, Technology

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