IOS 8 Simulator unable to boot

Question

When I try to run my app with Xcode 6 Beta 4 on the Simulator iOS 8.0 I always get this error:

Unable to boot the iOS Simulator

Answer 1

I have both 6.3 and 6.2 for some older swift tutorials, most of the time it is fine but sometimes I get this error when switching and it seems like it is some background issue with the simulator. I just restart my system and it works fine after boot. Kind of the hard way to go around but I dont do this often.