OSX it's as ugly as GNUStep/NeXTStep. Search for the Mastodon post on patching OSX to disable Aqua on MAC OS X < 10.5, and you'll see how they kept the exact same NeXTStep/GNUStep widgets. I am not trolling, Google/DDG it.
apart from calling it ugly i can confirm that. early OSX was 100% NeXTStep with a changed style. i loved it. MacOS now is really very much a modernized version of that.