I have a 1TB external hard drive I use for backing up my digital camera pics. I have been using it on my parents compaq presario. However I recently made the switch to a Mac and bought a early 2005 Power Mac g5 dual 2.0ghz with osx 10.5 on it. The question I want to know is, if I unplug the drive from the presario and plug it into the back of the g%, will the files show up or does the drive need to be reformatted? If so i'll just back everything up and reformat it and switch the drive to my computer. Thanks.