How your Mac’s security and privacy systems can cause duplicate copies of files to be written to your backups.
extended attributes
Do changing permissions or an extended attribute also alter a file’s modification date?
If you opt for ‘Mac-only’ format, isn’t that sufficient to preserve everything you need in an archive?
Some files rely on these to work properly. What happens when you share such a file using your iCloud account? The answer isn’t simple, but here are full details.
The behaviour of quarantine flags, SIP flags, and the mysterious new com.apple.macl attribute, which never ceases to puzzle.
How does Catalina’s new privacy protection extend to folders such as ~/Documents? New information fills in detail.
Classic resource forks passed into Mac OS X, but were deprecated by Apple in 10.8. Now in Catalina they can stop working: is this a new security measure?
Xattrs are marvellous features of macOS, but unless a developer is aware of their lability and how to preserve them, they aren’t good places to store metadata of any importance.
Updates to two utilities to create and edit metadata in extended attributes, which work better with Spotlight search. Now compatible with Catalina.
Apple’s attitude to document metadata remains ambivalent. But macOS does offer good support for extended attributes to pass through iCloud, if you know how to access it.
The Eclectic Light Company 