How to Screen Record (also called Screencast)
Open Quicktime Player
Choose a destination to Save to. We recommend Movies. Select Done.
Go to File>New Screen Recording
Check your microphone to make sure it is working
Select Record and Choose the area on the screen you want to record.
Then choose Start Recording.
When you are finished recording press Stop (in the top Menu bar)
Preview your video screen recording to make sure the audio and video sound and look good!
Save your video (File>Save) to Movies