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diskutil

Repairing Home folder permissions: a mystery

Once, you could run diskutil to ‘fix’ broken permissions in your Home folder, then it was replaced by repairHomePermissions in Recovery. Apple no longer documents this, but it’s still there. Should you use it?

November 18, 2022 Macs, Technology

Last Week on My Mac: Will Disk Utility ever work properly?

Apple could have chosen to make APFS open source or to document it fully, to help third parties develop maintenance tools. It chose not to, but Disk Utility still doesn’t work as it should.

May 22, 2022 Macs, Technology

How to make more use of your backup disk

APFS backup disks offer different possibilities for adding volumes for your own use, alongside the backup volume. How do you decide what’s best?

May 20, 2022 Macs, Technology

Disk Utility can only check backup disks in Recovery

T T Read More

In macOS 12.4, it’s impossible to run First Aid on any container or APFS volume on a disk with a Time Machine APFS backup volume, except in Recovery.

May 19, 2022 Macs, Technology

Should you ever repair permissions?

We used to repair permissions of the system until SIP. After a short break, we often repaired them again, this time on preference files. Why did Apple cancel that? Should we still try it for fixing problems?

January 27, 2022 Macs, Technology

Understanding snapshot data in Disk Utility

Explains the identifiers, sizes and tidemark data shown for snapshots in Disk Utility, in Monterey.

November 13, 2021 Macs, Technology

Disk Utility now has full features for managing snapshots

New for Monterey: Disk Utility now offers complete features for the management and maintenance of snapshots.

November 9, 2021 Macs, Technology

Juggling with HFS+ and APFS partitions and volumes: a primer

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The differences between HFS+ and APFS volumes explored. What a container is, and how to add new HFS+ and APFS volumes to a disk.

October 12, 2021 Macs, Technology

Why you shouldn’t delete one of a Volume Group in macOS 11 or later

Why deleting either the System or Data volume, but not the whole Volume Group, could get your Mac into trouble in macOS 11 or 12.

September 21, 2021 Macs, Technology

Time Machine to APFS: Maintenance and repair

Given their very different structure, backups on APFS disks shouldn’t require routine maintenance. Checking and repair is performed using Disk Utility.

March 25, 2021 Macs, Technology

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