Anyone have any advice or experience on hand-held GPS units compatible with Mac Powerbook? The GPS units I have looked at have all been PC (windows) only. I'm looking for a portable (hand-held) GPS unit suitable for vehicle use, and hiking use - one which I can load and update software using my powerbook. I picked up a Garmin GPS V today after carefully examining the package for compatibility and seeing nothing about the device being limited to PC (windows). Got it home, opened the box and took out the software package which had large "Open this first" printed on the front." Fortunately, I have seen that scam before, so I turned it over and on the back was the "...if opened can not be returned..." statement. So I looked through the books and found the thing was limited to PC (windows). I'm taking it back to the store tomorrow.