I've downloaded the .dmg, copied to Applications, waited for the verification - said 'open' once the verification is done then Xcode crashes. I'm running 10.10.3 which I think should work. I've tried uninstalling, re-downloading and re-doing the process with not luck. Has anyone else encountered this problem? Thanks.This is the error:Process: Xcode [396]Path: /Applications/Xcode-beta.app/Contents/MacOS/XcodeIdentifier: com.apple.dt.XcodeVersion: 7.0 (8123.26)Build Info: IDEFrameworks-8123026000000000~7Code Type: X86-64 (Native)Parent Process: ??? [1]Responsible: Xcode [396]User ID: 501Date/Time: 2015-06-10 17:25:29.684 -0400OS Version: Mac OS X 10.10.3 (14D136)Report Version: 11Anonymous UUID: A4A041F0-414B-EB94-4B70-43B0C8715464Time Awake Since Boot: 320 secondsCrashed Thread: 0 Dispatch queue: com.apple.main-threadException Type: EXC_CRASH (SIGABRT)Exception Codes: 0x0000000000000000, 0x0000000000000000Application Specific Information:ProductBuildVersion: 7A120fASSERTION FAILURE in /Library/Caches/com.apple