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 .xib/.storyboard error.

I have tried cleaning the project, downloading a previous version off of github, etc.. and yet the project still gives me the following error. "Failed to communicate with Interface Builder" as well as Command /Applications/Xcode.app/Contents/Developer/usr/bin/ibtool failed with exit code 255. Literally nothing was changed with the .storyboard file or anything remotely related to it.

What's more is that trying to open any .xib/.storyboard file (even the launch screen xib which I haven't touched leads to Xcode crashing which leads me to think this has nothing to do with me.)

Anyone else experiencing this? Any advice or temporary fixes?

Update: Trying to run anything on the simulator causes it to crash continuously or hang with the following error message: "Springboard quit unexpectedly"

Update 2: Playgrounds are unusable but do not crash. Also, these lads seem to be in the same boat as we are. https://forums.developer.apple.com/thread/13170

This is why we can't have nice things, Apple.

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

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 3

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)