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Anyone have any recommendations for ways to do screensharing of video on a Mac wirelessly over WiFi to a projector? In a solution that doesn't require plugging in some kind of USB dongle.

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It sounds like you need a WiFi-enabled projector. I have no idea if these exist, but if they do, I'm sure they'll ship with the software you need to use them. – Flimzy Sep 10 '11 at 8:22
Meta discussion of this and questions like it here. – Warrior Bob Sep 11 '11 at 19:55
@Warrior Bob: Sounds like it has production qualities to me. I know I'm tired of running video cables to projectors whenever I'm doing a show that involves projection. – dgw Sep 14 '11 at 2:10

Wi-Fi enabled projectors have been around for several years, at least.

A cursory Google search for "wifi enabled projector" turns up that and several other articles, plus reviews and some product listings. The primary complaint seems to be bandwidth; however I did not find any reviews including more recent Wi-Fi standards like 802.11g/n.

That said, it was a cursory search. I saw lots of other results that I didn't have time to click on. Some of them looked a lot more current, and I did find something that looks like a present-day product listing of wireless projectors.

My advice would be to shop around, read reviews, and get a good return/exchange policy if you decide to buy one (so you can test it with relatively low risk).

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