I'm new to Mac and just acquired a Macbook Air for presenting slides to clients. I will be travelling around, visiting clients - some will have old displays, some brand new displays. I would like to connect the Macbook to these various displays for a bigger view of the presentation slides. Mini DisplayPort to VGA (will cover a lot of projectors and Windows displays etc) - no problems here, I will need this adapter. Mini DisplayPort to DVI - this is the problem. According to the reviews on the Apple Store their adapter only works with DVI-D (which in turn is only present on newer displays). What DVI do I need for older Mac display equipment? Is it DVI-I or DVI-A?