I am running a new iMac with loads of memory and excellent NVIDIA GeForce GTX.
All the Blizzard games run with no problems at all.
GW2 keeps crashing randomly with either random reboot, computer freezes or game restart .
It is not a driver issue nor a heating issue. The only possibility is that the developers have not yet addressed all the Mac compatibility requirements.
For me it is so frustrating that I am considering quitting the game until such time as the SW is sorted.