On El Capitan, is it possible to display picture just on an external monitor, and not on the laptop's screen? I want to close my laptop and use it as a desktop, and I have every other piece of external periferals (wireless mouse, keyboard and external monitor) needed.
Depends on whether you need the MacBook to be opened or closed.
If it can be open, simply dimming the screen all the way will turn off the MacBook's screen.
If you'd like it to be closed, there's a free app from the Mac App Store called Caffeine that should do the job.
- Download Caffeine
- Allow it to reside in the Menu Bar (on the right side, to the left of the time and date)
- Connect external monitor (set up as separate monitor, not mirroring)
- Enable Caffeine
- Close your MacBook
At this point, I've found that sometimes the external monitor goes black. If that's the case, repeat steps 4 and 5 and try again.