问题
I have just installed xCode 6 from the AppStore and every time I open the iOS simulator it shows me this error:
Unable to boot the iOS Simulator
What can cause this problem and how do I fix it? (I am using a mid 2011 iMac with OS X Yosemite)
回答1:
You likely have DYLD_INSERT_LIBRARIES set. Open up Terminal.app and run 'echo $DYLD_INSERT_LIBRARIES'
If it is set to something, I suggest you unset it (or uninstall whatever set it) when needing to use the iOS Simulator on Mavericks. I suggest you look at /etc/launchd.conf and $HOME/.launchd.conf as the likely places it is being set from (you'll need to reboot after making changes).
OS X Yosemite has changes to work around this problem, so if you actually need the software that is setting DYLD_INSERT_LIBRARIES for other reasons, I suggest you use OS X Yosemite.
来源：https://stackoverflow.com/questions/26001902/unable-to-boot-the-ios-simulator