My Mac Mini overheats when I connect it to my new Passport Essential. I bought a fan for the Mac computer which makes no difference what so ever. The Geeks at Best Buy where I bought it, have no answer for the problem other than I should unplug it from the MacMini when I am not using it!
Thanks Joe_S, since my passport essential has only the one usb cable for power and info trans, I guess I will just have to continue unplugging the passport after 30 minutes or so.