How your Mac’s security and privacy systems can cause duplicate copies of files to be written to your backups.
file system
Do changing permissions or an extended attribute also alter a file’s modification date?
Q: Can an app running from this user account read/write this file? It should be simple to answer, but reality isn’t as kind.
What has happened in the Applications folder: two apps with an identical name? Isn’t it protected by SIP anyway?
macOS Catalina is the first version of macOS which boots not from a single volume, but from two: […]
Updated for 10.15 release, with a clearer explanation of how Catalina’s new boot Volume Group works in practice, in the Finder and Terminal.
Note: I have now updated this with the latest roadmaps for 10.15 release. A further article will follow […]
Some simple card tricks using TextEdit files demonstrate that most current apps don’t use new features in APFS. But they’re still safe and efficient.
How can you refer to an important file or directory, no matter where it’s moved on a volume, even when it’s renamed?
Catalina will change our boot disks substantially with its read-only system volume. Here’s an account of what we already have in Mojave.
The Eclectic Light Company 