Mac OS PRAM, delete
Problems with the resolution of your screen, the charger, and many other errors of the PRAM can fix-Reset master.
- Save and close first all running programs.
- Shut down your Mac and wait for safety about 10 seconds, so the memory is also emptied really.
- Press the command key [⌘], the [Alt] key, and the letter [P] and [R] at the same time.
- Press and hold the buttons and press the start button.
- Your Mac now starts up and seems to be the same to get back out there. Release all keys when the startup chime sounds for the second Time.
To your Mac at specific times, automatically start, you can select a schedule for this set up.
