macOS had this since Leopard days. First it was implemented via the OpenMeta([1],[2]) and later, by Apple, via Maverick meta tags. They both use the XATTRS of t

macOS had this since Leopard days. First it was implemented via the OpenMeta([1],[2]) and later, by Apple, via Maverick meta tags. They both use the XATTRS of the filesystem to store the meta-data. I didn't use macOS for a long time now, but when OpenMeta was still active, there were tons of applications, that supported it. I loved it and miss it badly. The only issue I had with it, was adding all those many tags to your files. Something, I'd like to solve with AI, these days. For me, the best system is a hierarchical file system with meta tags in XATTRS, that also can be used to build hierarchies, if needed. [1]: https://code.google.com/archive/p/openmeta/ https://code.google.com/archive/p/openmeta/ [2]: https://www.google.com/search?q=openmeta+macos https://www.google.com/search?q=openmeta+macos