I am running Rift on an iMac 3.2Ghz Inter Core i3, v 10.6.6., 4Gb RAM, and a ATI Radeon HD 5670 card.
The game runs very well for me with the exception of when I access the map by using the M key or access it by pressing the minimap button, the game instantly crashes.
I wanted to see if others may have this problem and if the Devs are aware of it.