

The Windows backup answer should be handled by someone else who has experience with BootCamp or VM because I do not use it. Follow the prompts in the dialog box and you will be set for your Mac backup. Time Machine will immediately launch and ask about your choice for backup. Once you re-attach the WD as a partitioned drive it will show up as two separate icons on the desktop representing two distinct and 'separate' volumes (even though they belong to the same physical entity). Now you can unmount the drive while you prepare the Windows side for backup with the Windows utility. The hard drive can be reformatted to be used on a Mac OS. Click Apply in the lower right of that window and wait while the process completes. A: AnswerHi Cosmicwiz, The WD My Passport external hard drive comes pre-formatted for Windows OS. The other partition you will select, name and choose FAT32 as it already appears. Once satisfied, click one partition and name and format accordingly in HFS+ for the Mac requirements note: the HFS+ formatted partition will be recognized by Time Machine and you will be asked if that is your wish to use it you will probably answer 'yes' and allow TM to do its thing.

Grab the slider/divider to set the size limits to your requirements. From the expansion list select 2 Partitions. (Be sure to select the topmost entry for the WD otherwise you will not have the Partition option.) It will show the Volume Scheme as Current with just the one partition that you did in FAT32. Go back to Disk Utility with the WD attached and follow a similar pathway as you initially did to format it, however this time you will choose Partition from the sub-menu. What is the capacity of the WD Passport? If it is sufficiently large (for example 1 or 2TB) you could partition it so that one section (partition) is formatted for Time Machine, and the other is left as FAT32 for the Windows portion.
