Recording Your iPhone or iPad Screen Using Your Mac
You can use the QuickTime Player in Yosemite to record your iOS device's screen and create videos. You'll need iOS 8 on your device and Yosemite on your Mac, plus the lightning cable to attach the two. Then you can record the screen as well as audio from a microphone. You can then save it, trim it or share it. You can also bring the video into other apps for more editing.