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partition

Inside APFS: from containers to clones

How APFS containers and volumes work. What hard links, clones and sparse files are, and when they break down.

January 2, 2023 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

Last Week on My Mac: Intricacies of the boot disk

Boot disk volume layout is intricate in Big Sur. M1 Macs lose the EFI partition on their internal SSDs and gain two more for APFS. Contents of /System/Volumes has also changed.

January 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

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

Dual boot: two versions of macOS on one external SSD

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Want one external drive from which you can boot two (or more) different versions of macOS? Here’s how to make it.

July 5, 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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