Holy Hell, if I am buying it, its because I want to exchange files. Select a Partition layout, then Options… & set to GUID Partition Table. I bought myself a 'my passport for mac 320gb'. Bottom right it will tell you the partitions scheme. You can only change from MBR to GUID by completely erasing the drive & starting over…

You would need to go to Disk Utility & check the drive is formatted as not only Mac OS X Extended, but that the underlying structure is GUID Check out Western Digital 5TB My Passport for Mac - Portable External Hard Drive, USB 3. Source: Macworld - Time Machine tips and troubleshootingĪpple's KB doesn't seem to quite be so explicit - OS X Yosemite: Disks you can use with Time Machine Buy Western Digital 5TB My Passport for Mac - Portable External Hard Drive, USB 3.0 (Blue) - Compatible with Mac, PS4 & Xbox, Time Machine Ready with Auto Backup & Password Protection (WDBA2F0050BBL-WESN) online at low price in India on Amazon.in. So if you have, say, a 750GB or 1TB drive, you must repartition it to use the GPT or APM scheme before it can work with Time Machine. My Passport drives come with both Windows and OS X utilities for generic backup, but your Mac’s Time Machine app is a much better way to backup your Mac. Although OS X supports MBR, there’s a catch: Mac OS Extended volumes can be no larger than 512GB on a drive partitioned with the MBR scheme. The My Passport drive comes with a few utilities already installed on it, and if you want to save them, copy them to your Mac’s hard drive before you erase the disk. first question: do I have to format 'My Passport for MAC' 2nd question: am I able to reassign where things are saved. Drives originally set up for use on Windows usually use the Master Boot Record (MBR) scheme, as opposed to the Apple Partition Map (APM) scheme, the default for PowerPC-based Macs, or the GUID Partition Table (GPT) scheme, the default for Intel Macs.

The partition map scheme describes how the drive stores its volumes. This article is quite old, but I think is probably the reason…

My passport for mac beyond backup