I've been looking for blog posts and content about macOS UX design and testing. Because it really is stellar. I'm curious what kind of stuff the elementaryOS team is reading that informs their design choices. Any ideas where to look?
Bit late replying, but I think the WWDC videos, especially old ones, relating to user interface design, what's new in Cocoa (not Cocoa Touch), and accessibility are great places to see macOS' interface decisions explained and justified.