- Start screen recording with
Shift + Command + 5
. A toolbar will show on the bottom, select the record mode & click “Record”. - Stop the screen recording either by clicking the “Stop” button in the menu bar, or by using
Command + Control + Excape
. A thumbnail of the recorded video will show in the bottom right corner. You can either click on it & do some quick editing or sharing. Or you wait until the thumbnail disappears - then the video file will show up on the desktop.
via Apple Support: How to record the screen on your Mac