Getting the Beta 4 OS (build 5A258f) for iPhone or iPod Touch onto your device has a glitch and the install will not work. Restoring the OS from the Xcode Organizer will get stuck before the OS in even installed. When the device is rebooted it will appear as a second device with no information in the Organizer. The original device will still be there and will be at a status of “waiting for device” forever. The Organizer apparently doesn’t recognize the device after it is prepared and rebooted.

The good news is that there is a simple workaround for the problem. After the device reboots and you have two devices in the Organizer right click the original device and remove it. Now perform the OS restore for the new version on the remaining device. The restore will work this time.