Do you realize Mac's also use Intel processors? For example my iMac uses an I7-3770 (Ivy Bridge) processor.
So in your survey I (many other Mac owners with Nvidia cards) could select several options,
1) Intel with a Geforce Video Card
2) Macintosh with a Geforce Video card
Mac's have never used an AMD processor, so I don't believe I need to put any processor to pick. Your MAC will have an intel processor with either a Nvidia or Radeon Video Card. Anyone can post what chip (i-5, i-7, etc) they're using with all the other hardware involved. Mac's have a totally different architecture than other manufacturers of MB's.
I doubt anyone is using a Mac running a Motorola chip today to play WB's like the Blue and White 350 mhz monster I used 20+ years ago. I used to play AW on a BBS using a Mac SE/30 ( 16 MHz monster) before the internet was around.