Have you been warned not to use extended attributes because they aren’t supported beyond macOS? But they are: here are details of file systems and Cloud services.
New batch file mode can add (e.g.) copyright metadata to hundreds or thousands of files. Handles unusual characters properly. Can also remove extended attributes.
What metadata you are likely to encounter, where it is stored, and how you can view and edit it. A grand tour of the Finder’s Get Info dialog.
Adds keywords, author, copyright and other info to any file on your Mac. Runs in El Capitan, Sierra, and High Sierra.
Want to make local Spotlight searches more effective? Add keywords to their metadata, such as Finder Comments. But there are some snags.
Hectic with SIP problems in High Sierra, the Meltdown and Spectre vulnerabilities, then iCloud Drive’s strange stripping of extended attributes.
Don’t use iCloud Drive to copy docs between Sierra and High Sierra, as they may well lose metadata in the process. Bug or feature?
Browse, cut/copy/paste, edit content, export as text, and more for any xattr attached to a folder or file in HFS+ and APFS, Sierra and High Sierra.
How to attach a metadata flag to a file or folder, to bring it under the protection of SIP.
Can now edit the content of existing xattrs, and create completely new ones, with arbitrary content.