Ineligible Devices section appeared in Xcode 6.x.x

The most likely solution for Xcode 6.3:

• In Xcode status go to: Menu bar-> Product -> Destination and find your device. It will be listed under Ineligible section
• Select your device. After doing this, you will be able to build and deploy to device!

More:
http://stackoverflow.com/questions/24039010/ineligible-devices-section-appeared-in-xcode-6-x-x