Still getting “Unable to boot iOS Simulator” with Xcode 6

Question

I have spent about 24 hours on this issue and still can't figure it out. I've tried everything written in the numerous notes already on this site, all for naught.

I've tried:

• Rebooting my Macbook Air
• Reinstalling Xcode
• Changing the devices inside of iOS Simulator

Does anyone have anymore ideas that may work before I jump ship and just go Android? (kidding..maybe)

Thanks, Mike

Answer 1

The overwhelmingly most common cause of this issue is that launchd_sim is crashing immediately.

The overwhelmingly most common cause of launchd_sim crashing immediately is because of your injection of code into every running process via DYLD_INSERT_LIBRARIES as set in /etc/launchd.conf.

If /etc/launchd.conf exists on your system, remove it and reboot. You can also just update to OS X Yosemite which no longer supports /etc/launchd.conf.

If that is the root cause, please mark this as a dupe of Unable to boot iOS 8 Simulator

If that isn't the root cause, look for launchd_sim crash logs in ~/Library/Logs/DiagnosticReports and attach the full contents of one report in an edit to your question, and I will also edit my answer in response.