Every time I have used it, it feels incredibly laggy with a crapton of useless animations.
Maybe it's better on Windows?
It is currently the best tool for me, as a non designer, to smash together (design) icons and export in my choice of format.
Overall we're pretty minimal when it comes to animations in product (i.e. here's a quick 22s recording of navigating between screens/opening properties panels in product today: https://video.non.io/video-2940009905.mp4) as we really want to convey that the app is snappy/performant. Definitely keen on diving in if you're experiencing otherwise. Happy to chat here or my email is jake@figma.com.
Regarding platform specific performance - it shouldn't affect things as long as you have GPU acceleration enabled. The majority of us over here at Figma are using OSX FWIW.
Dragging any object is laggy--particularly so over the slightly pinkish/purplish background area.
Would prefer to be sent a PDF, and you won't often catch me saying that.