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fsck

What does Safe Mode do to an M1 Mac?

According to macOS Help, safe mode stops some software from loading, and performs a check of the startup disk. Here’s a more detailed and accurate account of what it does.

January 17, 2022 Macs, Technology

Disk Utility still can’t check and repair APFS volumes and containers

T T Read More

Don’t waste time trying to discover which files are still open when you want to check or repair an APFS disk and Disk Utility throws an error. Here’s the solution.

November 19, 2021 Macs, Technology

How should you check an APFS backup store?

When your backups are stored on hard disks, even though they may use APFS, it’s important to check they’re sound. How to do better than Disk Utility.

November 18, 2021 Macs, Technology

Is APFS doing its job? Big Sur edition

APFS is almost 4 years old, and set out to solve the problem of accumulation of minor errors which has plagued HFS+. Has it?

March 1, 2021 Macs, Technology

Time Machine: 8 Preventing problems

Why you should always protect backup storage with a UPS. Should you also rebuild its directories every month? And when to archive rather than back up.

January 14, 2020 Macs, Technology

Which startup mode?

Diagnostic, Recovery, Safe, Startup Manager, Verbose, reset SMC/NVRAM, firmware restore, Target Disk/Display, Single-User (SUM) in outline.

November 16, 2019 Macs, Technology

Safe Booting in Catalina has changed

Disk integrity checks appear to have been dropped from Safe Boot. OpenDirectory databases are rebuilt. With a full listing of all blocked extensions.

November 8, 2019 Macs, Technology

Does Safe Mode check and repair disks?

Start up in Safe Mode: should it start by checking and repairing your boot disk, or should you do that separately in Recovery Mode?

October 15, 2019 Macs, Technology

Should you trust Disk Utility’s First Aid or fsck?

Third party tools for checking and repairing APFS are still very limited. Is it better to use fsck to check and repair APFS?

September 30, 2019 Macs, Technology

Is single-user mode (SUM) dead?

Single-user mode to run fsck to check and repair your boot disk became tricky with Fusion Drives. With a T2 chip, it’s not practical in its traditional form.

September 25, 2019 Macs, Technology

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