I have a Macbook Pro (OSX 10.6.8) and have connected through its mini DVI port to a projector. I bought a USB to VGA adapter to add another monitor but that monitor doesn't display what I have on the computer screen (just black). I'm trying to use it with programs like Keynote… Any suggestions?
I didn't find the right solution from the internet. References:
Alvin Hensel replied
394 weeks ago