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WsurfingSA said.. How about updating firmware on GT31's if you're on a Mac?
Thanks Dylan

The update software can only be run in Windows.
I don't know if anyone has tried it, but you should be able to do it on a Mac by booting the Mac up in Windows natively.
Otherwise, find a friend with windows. :-)
BUT, you should not need to update the firmware if you already have one of the Genie windsurfing versions 1, 2 or 3 that end in "a" or "T", unless you are experiencing problems. (Freezing or won't get a fix etc).