How to connect a ViewSonic projector to my MacBook Pro OSX 10.9.5?

Rosicrusian wrote:

… problem is ViewSonic do not have software for Macs, just for windows…

To connect a projector to Mac, you don't need any software/drivers/.... just a fitting cable.

A MacBookPro - depends on which one - offers a miniDVI/thunderbolt output, and your projector has a DVI-in, or older models, at last a VGA connector. All standards.

Check the manuals! 😉

Check it twice, there's an unbelievable number of 'flavors' for plugs, mini/micro/whatever ... A colleague of mine, travelling a lot, has a whole shoebox of adapters 😝

You get for any actual plug-combo connectors/adapters ....

At Amazon, starting at 10-15$ ...

When you connect your Mac to the projector, it will detect it, and in the SystemPreferences (upper left on your screen, under the  icon),' Monitors', you can decide to 'span' your Desktop across two screens, or to 'mirror' your Macs Desktop on the other device - up to you, and your needs.

Best practice: do a test drive BEFORE the 'hot' show ... 😉

==addendum==

from apple.com/MacBookPro (if this is your device): :

Thunderbolt digital video output

• Native Mini DisplayPort output
• DVI, VGA, dual-link DVI, and HDMI output supported using Mini DisplayPort adapters (sold separately)