I know it has been 7 years since the last comment here and 10 years from the first but it seems that this obvious problem with Mac Colors goes unfixed. I am using SU 21 on an M1 Mac and believe it or not most of the bugs with all software is about over. I would be happy to donate to the cause if this plugin would work on my machine. Only having Icons to pick materials from is hideous, and so I am anxious to use this great extension. I have successfully loaded it into SU 21 and it shows in the extension manager, however it does not show in the dropdown extensions menu nor do I see a change in the color Palette. Am I missing something?