Mac users should know:

This post I write only because of the comments, some difficulties have been identified that have nothing to do with the hard drive itself. Mac OSX settled is an application called Disk Utility, which should be started after the hard drive has been connected and running. Then she has not yet seen even the "desk". In that program now but it is already recognized. On top of the program window is a button "Activate". When this is done, the hard drive icon on the desk. Now a copy of the products already on the hard drive manufacturer's software to customize (for example, on Mac HD pull). Now you can and should be reformatted final of utility from your hard drive. Then it is ready to be used with or without the software from Western Digital. From the Disk Utility from can reauthorize your disk at any time, if you want to turn them off in between times, which is entirely in your hands, energy saving and not droning as it gets.
The hard disk itself earned only one point deduction, I think, because it is very difficult. Who ever has in his luggage, is not very appreciated.
Hope my review is helpful.