Xcode Beta "Verifying Xcode.app" I just installed Xcode beta, and when trying to open it, it stays on "Verifying Xcode.app" and does not proceed. Why is that? I have the latest OS X mavericks.
Open terminal and run below commands

cd /Applications
xattr -d com.apple.quarantine Xcode.app


This will bypass Gatekeeper in OS X and launch Xcode quickly.