With the OS X 10.10 SDK, NSPopover
seems to default to including an NSVisualEffectView
somewhere in its hierarchy. Trouble is, I can’t seem to find any way to manage the effect.
I’ve tried the Xcode View Debugger but that didn’t offer very much information:
Are we expected to be able to tweak this vibrancy or just accept it and move on?
I wouldn't mind being able to tweak the effect or change the appearance of certain items in the (apparently enforced) dark mode.