Xcode 6.4/7 crashing after El Capitan beta

Question

I updated my computer to the latest beta that was released to developers last night and the same project that was compiling fine yesterday night now fails due to a supposed

Answer 1

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.

Answer 2

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)

Answer 3

Running xcode 7.0.1 on ElCapitan with all updates installed and xcode is quitting often as above but not quire often enough that I cant develop for it. Seems to occur when setting constraints and positions in storyboard. iMac is latest and restarted at least once a week as off on weekends so stable as I can make it.

As with every release of Apple we just need to wait for the updates for xcode and or ElCapitan to fix it.

So rule is to save/build often to save code before playing around with constraints as its liable to just quit on you.

Answer 4

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

Answer 5

It's documented in the El Capitan Beta 6 Release Notes, so you cannot blame Apple if you didn't read them.

Known Issues

• Xcode 6.x has known compatibility issues when run on OS X El Capitan. It is strongly encouraged that you use Xcode 7 when running on OS X El Capitan.

EDIT Mostly the tone of this answer was brought about by the "This is why we can't have nice things, Apple." statement in question, implying the OP thinks he has a god-given right to use beta operating systems without impunity.