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Last Week on My Mac: Attack of the Clones

We’re almost unaware of clone files, and how they’ve changed macOS. But look at most documents that have been saved more than once, and you’ll see they’ve now be cloned.

March 24, 2024 Macs, Technology

APFS: Files and clones

Understanding how APFS works: inodes, attributes, file extents, extended attributes, and how they change with editing and cloning.

March 20, 2024 Macs, Technology

What should we know about APFS special files?

Knowing a little about sparse and clone files in APFS is dangerous, as it can lead you to draw the wrong conclusions.

January 3, 2024 Macs, Technology

Why cloning a System volume isn’t a good idea any more

We even used to use it to defrag free space on a disk: clone the volume to another disk, and clone it back again. Why is cloning becoming so hard now?

September 15, 2023 Macs, Technology

COW and clones: how they save space and SSD wear

How does copy on write work, and how do clones grow apart? What effect do they have on the use of space and performance?

May 4, 2023 Macs, Technology

APFS hard links, symlinks, aliases and clone files: a summary

Similarities and differences, how to make each in the Finder and Terminal, how much space they use, and how they work in APFS.

April 28, 2023 Macs, Technology

Should you remove duplicate files?

Save space on your storage and backups by removing all copies. But does it work if they’re APFS clone files? And does that housekeeping utility detect clones for you?

April 22, 2023 Macs, Technology

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

Free space on an APFS volume is an illusion

You’re in control of a traditional file system, but with snapshots, clones, sparse files and other volumes sharing free space, APFS isn’t as simple.

December 30, 2022 Macs, Technology

Copy, clone, backup: is there a difference?

Copies, clones and backups are three different things. Here their differences are explained with examples from APFS and modern macOS.

October 1, 2022 Macs, Technology

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