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MY BOOK ESSENTIAL 
USER MANUAL
USING THE DRIVE WITH A MAC – 43
Using the Drive with a Mac
This chapter includes the following topics: 
The My Book Essential drive that you purchased is preformatted as a single NTFS 
partition for compatibility with all updated Windows operating systems. If desired, you 
can reformat it to HFS+J for Mac OS X operating systems. (You can also reformat a Mac 
drive to NTFS.)
Reformatting the Drive
CAUTION!  Reformatting the drive erases all its contents. If you have already 
saved files on the drive, be sure to back them up before reformatting it. 
Go to 
Refer to Knowledge Base Answer ID 3323 for reformatting the 
drive to Mac OS X format. (See ID 3645 for formatting a Mac to the NTFS file system for 
use on Windows XP and ID 3647 for formatting it for Windows Vista). See 
“Troubleshooting” on page 52 for more information about reformatting a drive.
If you reformat your drive for use with a Mac, follow the procedures below.
Installing on a Mac OS X Tiger/Leopard/Snow Leopard
After you physically connect the drive as shown in Figure 3 on page 6, the 
 
WD SmartWare virtual CD mounts on the desktop and is listed under Devices in Finder. 
Note: WD SmartWare software is provided in the form of a virtual CD (VCD) drive 
on your My Book drive. The VCD displays on your desktop and behaves just like 
a physical CD. To view the contents of the VCD, such as the documentation and 
some extra programs, right-click and select Open.
The My Book icon also displays on the desktop. 
1.  
Double-click the WD SmartWare virtual CD, and then double-click 
WD SmartWare.exe
2.   Mac OS X Leopard and Snow Leopard only: A message asks whether you want to 
use the My Book drive to back up with Time Machine. 
•   If you do not want to use the Time Machine backup software, click Cancel
•   If you want to use the Time Machine backup software, click Use as Backup Disk
The My Book icon now displays as 
.