I know I'm extremely late to the party on this thread and sorry for the necroing but I'm always surprised that nobody ever seems to mention
Cog as an amazing, lightweight and functional player for Mac:
https://cog.losno.co/
Used to be that it was inactive in terms of development, which didn't prevent me from using the old version for years (amazingly that version still works perfectly well, you can find it at this link here if you want a version for an older computer), but now it's been picked up by a developer again, by virtue of it being open source.
What I personally love about it is that you just point it to your root folder for your local music, and then it lets you access the Mac OS file tree, double click on any folder to instantly start a playlist of that folder, and that works if you have subfolders too (for example if you want to listen to an entire artist's discography that you have all in one folder for that artist, with multiple subfolders for each album, you can). Maybe it's just because it's tailored to the way I want to listen to my collection (I have everything extremely well ordered and don't care for Artist/Albums sorting) but I honestly have never found any fault with Cog in general in terms of functionality for just playing stuff. It's very versatile and doesn't really have had any issues with the files I threw at it (I think the only time I ran into a wall was trying to open some wavpack files
https://www.elmedia-video-player.com/free-mac-blu-ray-player.html, and that has since been fixed).
Highly recommend it if anyone is still looking for a good player for their local collection on Mac. And it's also a native Mac app and not a port or a cross-platform app (or worse, some electron atrocity), which is always nice.
