I would argue that the changes made to macOS HIG in the past ~15 years were rather cosmetic and incremental. It is a moving target, but it is moving very slowly

I would argue that the changes made to macOS HIG in the past ~15 years were rather cosmetic and incremental. It is a moving target, but it is moving very slowly. Anyway, cloning macOS UI is not my primary goal. I just want to build a widget toolkit that could be themed however I want.