This is due to the current Mac OS's lack of write ability for NTFS formatted drives. Both the Enterprise and DL3 come pre-formatted with a widely-used Windows NTFS filesystem. To use exclusively in a Mac environment simply format the drive on your Mac using the HFS+ filesystem.
If you plan to use the Enterprise or DL3 between a Windows and Mac environment you have two options:
- Install Fuse for OSX
Download link: https://github.com/downloads/osxfuse/osxfuse/OSXFUSE-2.4.2.dmg
*****You must check the box "MacFUSE Compatibility Layer" on the installation screen.
Install NTFS 3G Driver
Download link: http://downloads.sourceforge.net/project/catacombae/NTFS-3G%20for%20Mac%20OS%20X/2010.10.2/ntfs-3g-2010.10.2-macosx.dmg
*****At the caching selection option, pick no caching best results.
- Reformat the drive in the exFAT format.
*****Some older operating systems may not be able to use the new exFAT filesystem.
Note: To use exFAT in the Windows XP environment, download and install the Microsoft Windows KB955704 update.