Connect one end of the USB cable to the USB port on the back of your Optoma projector, and then connect the other end of the cable to an available USB port on your MacBook.

The Apple USB-C VGA Multiport Adapter lets you mirror your Mac display to a VGA-enabled projector, TV or display in up to 1080p HD. Thankfully there are cheaper third-party USB-C to VGA adapters.

Starting Wednesday at the Infocomm 2008 conference, being held this week in Las Vegas, InFocus will be showing off three new classroom and lecture hall projector series, along with new technologies ...