NTFS Read / Write in OS X

Mountain Lion has native read / write support, but it is not enabled by default.

Start off by editing your fstab like in any other linux/unix environment.

sudo nano /etc/fstab

Then add the following line to enable read/write permissions on your NTFS partition. Replace VOLUME_NAME with the name of your volume. You can find this in disk utility if you don't know it.

LABEL=VOLUME_NAME none ntfs rw,auto,nobrowse

Save by "control-x" to exit then "y" to save if you are not familiar with nano.

If you have a space in your VOLUME_NAME, you can escape it with \040.

You will need nobrowse parameter in order for this to work. This is so that it doesn't show up as a mounted drive on your desktop. Once you have edited your fstab, either reboot or unmount/remount the partition in disk utility. I would suggest reboot however.

In Finder, navigate all the way to the top with:

Shift Command C

or in terminal:

cd /Volumes/

You should see your read/writable NTFS partition.

If you need quick access to the drive, create a symlink on your desktop:

ln -s /Volumes/VOLUME_NAME ~/Desktop/VOLUME_NAME  

Enjoy!