Dec 29, 2012 There's an important difference between these WD drives apart from formatting and colour, which theluggage alluded to - My Passport for Mac works with USB 2 and 3; My Passport Studio works with FireWire 800 and USB 2. So if you want to use USB 3 you need the silver Mac version.
Hello Zanaelf
If you look at the format of the external hard drive, it is probable setup to NTFS and is something that Macs can read and copy from but cannot write to it. The only way you can do that is to reformat the drive to either so that it will be for Macs to write to or you can format it to FAT and it can read and write to both. Check out the articles below for more information. Also check out the other discussion that I provided as another user found a 3rd party piece of software that may assist you further if you do not want to reformat the drive.
Regards,
-Norm G.
May 16, 2014 9:33 AM