My two cats are fascinated by my MacBook Pro. They never go near my parents PC laptops but constantly rub up against mine and watch what I am doing on screen. Is it just my cats or do other peoples cats like macs too?
The cats hang around your Mac because they like you more than your parents (or you're better company on the couch), and you just happen to own a Mac. It's not definitely not the Mac.
stop cleaning you MBP with catnip and you won't have that problem. Seriously though my mom's cat is always laying in front of her iMac and on the keyboard. when there was a PC, never even looked at it. haha.