I find it really disappointing that there is no way to download only the patches for Mac. Having to download a full 150+ GB to fix bugs is absurd. Is this a GOG issue or a Larian issue?

it could be a you issue but lets assume you are using off line installs not Galaxy and that you want the current 976 build witch is good until patch 6 messes it all up again

Gog handles the off line installs so thats a Gog issue i.e, they only post so many files to their server and a full copy of the game is considered good enough for the few Mac users

if you have Galaxy then its a Larian issue and again patch 6 is due to drop any day now so no one really cares about the current bugfest which is build 976

Thanks for the answer. Forgot to clarify I don’t use GOG Galaxy, so I download the offline files.
I guess I may look into that, though I hate this kind of download manager…