As of this date, was using Stable version.
Attempted to auto-update (from in-game), and now I get this:
XQuartz 2.7.7 downloaded - Still does not work.
.net Core Runtime 2.0.6 downloaded (from Microsoft) - not yet.
Then I realized I had the zip file. Re-extracted osu! from zip file, seemed to work for the time being...
Ideally, auto-update should not bring up the error message mentioned above.
Update May 8:
Well okay. The error message comes up whenever I try to update osu via the "click here to restart now!" button ingame. I have the zip file and a bit of backup skin/BM files. :thonk:
Update May 10
Updating with the "run osu!updater" in options works fine. So it's just the way above that is faulty.