I have a reasonably large music collection, and iTunes has significantly slower performance when loading or when doing large batch edits than I prefer. Yes, I do understand that you do not have to let iTunes manage the files, but a lot of the tight integration of iTunes breaks down at that point. ITunes has a fundamental assumption that it will manage the 'physical' files, and you will manage the library as one giant blob. Take away the ability to manage (and see) the folder structure and I am at a significant disadvantage when picking my next song. Keeping my music for each dance in a folder is ESSENTIAL, for me. I DJ for professional dance competitions (think 'Dancing with the Stars' only different dances).

I STRONGLY prefer to have a folder & file arrangement that I manage. If it works for you, by all means keep going that way. It is not 'scriptable' in a meaningful way that I have found.but I am still a new user, so that may be in there somewhere. It is not perfect, but it is the best I have found in a month of looking around.at least for my needs. The batch editing options are good, it will alter filenames and directories based on the tags, tags can be 'composed' of text and other tags, and it offers good support for find & replace in tags. I have settled on 'Meta' as a collection & ID3 tag manager for the Mac. I would prefer to avoid running Windows applications under Wine - that is not supported in Catalina, and I will likely upgrade in the next year or so as the driver issues are resolved. I still do not view iTunes or Music as offering the tools and capabilities that are needed to manage a DJ collection over time. I am not (yet) upgrading the Mac to Catalina (there are some known driver issues with HW that I have), so I am not able to evaluate the 'iTunes' replacement 'Music.' But, early reports are positive about cleaning up the bloat from iTunes. On Mac, I have been experimenting with several different tools that are free, or offer a free trial. That much of my workflow will remain the same. I use MixedInKey during initial track prep. I keep my music organized in a folder & file structure that I prefer to manage.

I have recently switched from PC to Mac for my music laptop.

Mp3 tag editor mac os