How can I use my passport Ultra 2tb on both MAC and PC?

I recently purchased my passport ultra 2tb. I connected it to MAC first to reformat it and it seems to work. However, I tried using it on my pc also but it won’t seem to work. The pc has recognized the hard drive but it won’t show up in “computer”. How can I use this in both mac and pc?


A simple method is to format FAT32. The downside is tha largest file size it will handle is 4 Gig. A drive formatted for Windows NTFS will be read only on a Mac. See this Post #6 and see if they help