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disk

External boot disks still don’t work properly with M1 Macs

T T Read More

Making an external bootable SSD for an M1 Mac has proved tricky. Has this changed in macOS 11.2? If you’ve already got 11.1 running on one, how do you update it to 11.2?

February 10, 2021 Macs, Technology

Inside the file system: 4 Summary and references

Disk structure diagrammed for comparison, from the partition table, to HFS+ and APFS volumes, with further references.

October 10, 2020 Macs, Technology

Inside the file system: 3 APFS containers and volumes

What you need to know about the APFS file system, its containers and volumes, so you can understand errors and how to repair them.

October 8, 2020 Macs, Technology

Inside the file system: 2 HFS+ volumes

What you need to know about the HFS+ file system, so you can understand error reports and how to repair it using Disk Utility and other tools.

October 7, 2020 Macs, Technology

Inside the file system: 1 Disks and partitions

What you need to know about disk formatting using the GUID Partition Table (GPT) to understand its problems and how to repair it.

October 6, 2020 Macs, Technology

What does Disk Utility’s First Aid really check in Catalina?

Apple says that if you run First Aid on a disk, each of its volumes is checked too. Is that really true?

October 3, 2020 Macs, Technology

EFI System Partitions: a hidden problem?

What do you know about the hidden and unmounted EFI partition on all the disks you use with your Mac? It could be very important.

June 16, 2020 Macs, Technology

Disk, drive, HD: does it really make any difference?

The fine line between precision and obscurity examined in the Finder, against Apple’s Style Guide, and its accuracy. And what does HD stand for?

February 29, 2020 Language, Macs, Technology

Making sense of Disk Utility and disk structure in macOS 10.13-10.15

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The Finder, Disk Utility and Terminal show disks and volumes differently, according to their function. This can appear confusing in Catalina until it has been explained.

December 18, 2019 Macs, Technology

Fusion Drives in APFS

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How does the volume structure differ between Fusion Drives in HFS+ and APFS formats? Does Disk Utility show an accurate picture?

October 15, 2018 Macs, Technology

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