I'd like to know the answer to that as well. From: optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On Behalf Of CPMC Ophthalmic Diagnostic Center Sent: Wednesday, March 28, 2012 3:25 PM To: optimal@xxxxxxxxxxxxx Subject: [optimal] From Denice Mac Question OK all of you Mac Heads. I need a DVI to VGH adaptor to connect a Mac Book to a PC Projector for Grand Rounds A dizzying array of adaptors on Amazon.com. They all LOOK alike, with different discriptions. All say "for Macbook ) Yet, how come so many? I already ordered one I thought would work and the female end to connect to the MacBook is too large Don't wish to go down this road again. Why not just one generic size? D. Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS Ophthalmic Diagnostic Center CPMC Department of Ophthalmology 2100 Webster Street Suite 212 San Francisco CA 94115 (415) 600-3937 FAX (415) 600-6563