There is a graphics thread on the official forum detailing other Mac users experiences, it’s worth checking to see what settings they have their games on and how it is playing.
You may need to enable laptop mode for smooth gameplay. If the Mac you’re looking at only has Intel graphics then it doesn’t have a dedicated GPU. 21″ iMac, the 27″ iMac, the 5k iMac and the high spec. The current Macs with dedicated GPUs are the high spec.
This list isn’t exhaustive and if you have any tips I have left out, please feel free to leave a comment and I will add them, giving you credit of course 🙂
