Xcode 6.4/7 crashing after El Capitan beta

A workaround was found thanks to "lembacon" on the Apple Developer Forums.

In Terminal:

cd /Applications/Xcode-beta.app (or wherever your Xcode 7 beta 4 is located)  cd Contents/Developer/Platforms/iPhoneSimulator.platform  cd Developer/SDKs/iPhoneSimulator.sdk/usr/lib  sudo mv dyld_sim dyld_sim.orig

Seems to work for iOS projects but watchOS is iffy.

EDIT:watchOS solution:

cd /Applications/Xcode-beta.app (or wherever your Xcode 7 beta 4 is located)  cd Contents/Developer/Platforms/WatchSimulator.platform  cd Developer/SDKs/WatchSimulator.sdk/usr/lib  sudo mv dyld_sim dyld_sim.orig  

Another Edit: As mentioned by sciasxp, this also works for 6.4. Hopefully we'll get new iOS and Xcode betas soon that permanently fix this.

Another Another Edit: A new iOS beta is out today, as well as a new Xcode beta. This issue should be resolved.

There is one weird fix :

Reinstall Beta 5 by downloading and running the following directly from Apple's CDN. This will restore Xcode but you will loose sound :)

http://swcdn.apple.com/content/downloads/43/22/031-29032/71ihp9c54k547fvol25w5g85z9323gqwnr/OSXUpd10.11.pkg

http://swcdn.apple.com/content/downloads/43/22/031-29032/71ihp9c54k547fvol25w5g85z9323gqwnr/FirmwareUpdate.pkg

Xcode 7.0 beta 5 is out with support for El Capitan beta 6.

Release Notes

Xcode 7 beta 5 resolves issues with building iOS projects and running the iOS simulator on OS X El Capitan beta 6. (22089926)