I lost my copy of Strawberry that worked on Mojave. i dug around a little and found a mention that version 0.8.4 worked "flawless" (that's a direct quote) on Mojave.

I looked it up on GitHub but there's only versions for Windows and Linux. Sort of; I read on the release notes about macOS code being removed, therefore an earlier version of whatever I read must still have it but I don't know how to compile it from scratch.

I don't care if it's old it'll play music just the same, right? Same reasoning I'm still using Mojave, it still works just the same. Whereas if I'd moved to a newer macOS, I'd no longer own my own computers. Funny thing, huh? Apple signs the newer Strawberry, therefore it can revoke it at any time. Who owns those apps? It should've opted for showing some warning. The users that are more likely to worry about an app not being signed I think are those who aren't likely to go beyond the confines of Music.app/iTunes/Spotify anyway. on second thought, nothing. =]

...I guess that's it, thanks !