Should we make a note somewhere in the docs that most keyboard shortcuts that involve ctrl can be replaced with command on OSX? Seems kind of tedious to have to go through every page and mention cmd instead of ctrl. But maybe it's less confusing in case there are shortcuts that really use ctrl.

Results from testing on OSX with ffmpeg static build:

Is it this bug? https://bugs.kde.org/show_bug.cgi?id=364173

Found the fix for the loop. There is a check used by the unmultiplyAlpha function that checks the alpha values. Unfortunately, it's only written to consider positive alpha values. I don't know if there are any other checks for alpha or color values like this that assumes the values are > 0, but they didn't come up anywhere else in the sample file in the bug ticket.

Appears not to have problems on a Mac. However, there are some things that I can't test in a meaningful way because assistants are not visible on Macs yet. However, there is no slow down in changing brush size from using the tablet+gesture action or switching applications.