Whenever I open Xcode it crashes. I've tried deleting my derived data but it didn't work. Im using version 8.
Jason AndersTreehouse Moderator 144,971 Points
I've had that happen once before. I had to delete and re-install it from the app store. Just make sure you're running Sierra, as the version of Xcode in the app store right now will only run on that. If you're still on El Capitan, you can download past versions from the Apple Developer site, but you will need an Apple ID to log in. (Here, you'll want version 8.2.1)
Other than that, I'm not sure what could be the problem. Sorry. I hope you get it sorted out.