I've tried to record a specific part of the screen with QuickTime Player. But again nothing works as expected with the Mac, but I have to work with.
My result is always a black video with the selected size.
What I've done so far:
Open: QuickTime Player
Choose: File > New Recording Screen
Press: Red Button
- Mark an area on the screen for which I want to record.
- Click: Start Recording
On the screen recording I press stop and I get back to the player. When I play the recorded movie, I only get a blank screen. I see from the consumed time, that it was recorded and also a save would be not empty.
What is the trick to getting something useful with this Apple Product?