GUID and exFAT since no legacy machines and OS's are involved, however the 10.6 machine must be 10.6.5 or later.

OS X can default read NTFS disks, but not write to them. OS X supports the option to read NTFS-formatted drives, but has not supported writing to these drives. Therefore, the use of a third-party driver such as Paragon NTFS or Tuxera NTFS has been.

Format the new drive on the Win 7 machine, right click on it's icon and format: exFAT.

If you ever want to connect the drive to a XP machine with exFAT installed (free from Microsoft), then your looking at MBR + exFAT.
If the XP machine can't install exFAT, like it's not verified, then MBR + FAT32 (MSDOS) and keep all files under 4GB in size.
Mac Os Ntfs Support
If you want to connect the drive to consoles and other devices, then MBR + FAT32 (MSDOS)
Don't use NTFS
Mac Os Ntfs Write
Mac Write Ntfs
Apr 23, 2012 11:07 AM
