Did you know that you can record the screen on your iOS Device using Quicktime X and OS X 10.10?
1: Open Quicktime X
2: Click File > New Movie Recording

3: Connect your iOS device to the computer using a Lightning cable.
4: Click the Dropdown arrow to the right of the record button and choose your iOS Device as the source


5: Now you’re ready to record your screen. Happy casting!

Useful! Now If only I had a Lightning port.