About as usual for a CEF/Electron app last I tested ~ a year ago. I.e. "impressively well considering, but still not all too great". For a while there was an issue where it was launching games in compatibility mode, but I assume that's been long fixed without needing to migrate the base app (if anyone regularly uses GoG on their Mac feel free to chime in, I only have a work MacBook these days).
zamadatix|1 month ago