title: Xcode 7 Beta WON'T INSTALL
body: <p>I've been trying to install the Xcode 7 Beta 3 from Apple for hours and it just won't run on Yosemite 10.10.3. I download and run the installer, and everything works fine, but when I try to open Xcode beta I get a window that lasts for 30 minutes that says "Verifying" and then when it closes sometimes I get a window that says the Xcode beta was downloaded from the internet and it wants to know if I still want to open it. I click "Open" and nothing happens!!! According to task manager, Xcode beta is not responding. I've tried to reverify it 6 times, and even deleted and reinstalled xcode 7 beta from Apple. I'm going to put the El Capitan public beta on my external hard drive and see if xcode 7 will run on that. Though, is there anyway I can get Xcode 7 Beta 3 to run on Yosemite 10.10.3? I have a mid-2009 MacBook Pro, 2.66GHz Intel Core 2 Duo, 4 GB RAM, 256GB SSD.</p>