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Question: does it support mac os?

i copied my pics from iphoto to a 2GB flash drive but they won't work on frame - says no file. i can play an mp3 copied from itunes on the same drive. the files are all jpeg's so i don't understand why they won't show, and the mp3 plays just fine!!! am i missing something really obvious or is it just that it doesn't support mac pictures? help!!!! thanks in advance!