How to fit over 90 GB of files into a sparse bundle that’s only 13.8 MB in size, just like Doctor Who’s TARDIS. No APFS sparse files are involved.
Finder
The Finder uses a small grammar, which ensures its consistency. iCloud Drive is already an exception with evicted files, and pinning is highly inconsistent, and not designed for humans.
Introduced in System 7 in 1991, long before symbolic and hard links became available in Mac OS X, they’ve been revised and extended to bookmarks since.
How to prefix a file or folder name with a . to hide it, how to use chflags, and how they differ. And what are all those .DS_Store and ._ files doing?
What is that text-encoded data embedded in so many Property Lists? Most are Bookmarks, and here’s how to decode them.
Some apps have odd problems when they’re run in translocation. Here’s how to tell whether they are, and what to do about it.
Gatekeeper may decide to run a new app from a random location, in translocation. The rules for this are explained, and how to ensure that doesn’t affect your apps.
If the Finder’s Get Info dialog may report inaccurate total file size, does that mean the folder sizes are also incorrect? And does this affect volumes too?
Documentation changed to match the bug, seldom-used features that no longer work, and malware protection that devoured parts of Xcode.
Classic Mac OS could give the size of data and resource forks. High Sierra ignored extended attributes, and Sonoma tries to add them, but only includes some.
The Eclectic Light Company 