Re: Mac display
Still trying to figure out why you mention the display?
NeXT from which MacOS is derived used Display PostScript under the window system so that would have been vulnerable. I'm no expert on Macs but I believe that got reworked and switched to PDF for a superficially similar role in OS X. No, that wouldn't be vulnerable - PDF doesn't have the same generality as PostScript, and lacks decision making and flow control constructs, you just get the basic drawing operators.
Biting the hand that feeds IT
