Just shows the entire ext HD unallocated. I ran Disk Management and saw the ext HD listed but it did not show any partitions. Once Windows 7 started I opened up My Computer and I did not see the ext HD listed. I did not eject and unplug the ext HD before restarting, not sure if it played into my problem or not but thought I'd mention. Named the top partition Mac and chose the format Mac OS Extended (Journaled), named the bottom Windows and chose the format NTSF.Īfter running Time Machine on the Mac partition I restarted the iMac to Windows 7. Used Disk Utility to partition the ext HD 50/50. I looked up about the different HD formats for Mac and Windows. Time Machine does not work with the Paragon driver the ext HD came with so I decided to partition it into two parts one for Mac, the other for Windows. Bought a Seagate Backup Plus external USB HD for extra space for games on the Windows 7 end and Time Machine for her iMac. We partitioned her HD to run bootcamp with Windows 7 to play some games. My wife has an iMac with OS X Lion on it.