Oh wow! ???
One day I would like to know how it's done... but first I have to move to Monterey.
There's really nothing to it seeing as I am only in my mockup stages for BBX Mercury within Sketch - re-making traffic lights and scrollbars as I don't have access to any original material for it.
I doubt I'll name it BBX Mercury seeing as it would conflict with people's memory of that theme.
Max Rudberg did give me the go ahead and I do have his blessing(so to speak - William Bart too if I'm not mistaken) I just don't have any original material such as hi-dpi images.
The tiled wallpaper is one of those tile images found in the DMG file and Audion(Spaudion variant) sports the BBX Mercury skin. All available without jumping through hoops ?
Menu Bar Tint is what gives that look and probably OldMenuBar too(I forget)
Sorry for explaining this soon - I just couldn't wait