I haven't seen a Mac on the show, either, but I take computer placement with a large grain of salt. In movies, one tends to see Mac placement where it really makes no sense (the Pentagon??), and I tend to notice more PCs on TV.

What really cracks me up is when I see an obviously PC monitor and case, but the OS being displayed is clearly Mac.

Word to the need for fic. I think Daniel would have gotten one too many viruses (probably at home or someone transferring files from off-site... Although in "Hathor" the SGC had internet access. Hrm) and insisting on a Mac. Plus, the graphics are better. Right tool for the right job, eh, Daniel?