How to connect your Mac to a projector, for giving presentations or creating your own home theater

You can connect your Mac computer to a projector for giving presentations or hooking up a home-theater system. Here's what ...
Ars Technica

MacBook Air and Airplay mirroring to a 4:3 projector

I'm helping my wife set up for a conference, and trying to use her MacBook Air's airplay mirroring to an Apple TV, but the 4:3 (1024x768 max) projector is making dealing with aspect ratio's fun. I set ...