For years now, Apple has provided support for Microsoft's major drive formats—namely, FAT and NTFS. With full read and write support for FAT32, everything works well... until NTFS support is required.
Apple's native NTFS driver handles read capability, yet write support has long been absent from the equation. Even though write support is built in to the native driver itself, it's disabled by default in OS X, since Apple doesn't officially support writing data to NTFS drives.
Though Apple supports exFAT, an alternative format also created by Microsoft to read/write OS X and Windows, the fact remains that Windows drives are formatted with NTFS by default. This fact makes it very likely that you'll need to write data to an NTFS-formatted drive from a Mac at some point or another.
Luckily, NTFS write access can be enabled on a per-drive basis using Apple's native driver. Remember though that this solution is unsupported, so care should be taken to properly back up data should anything go wrong, such as data corruption and/or subsequent loss.
With this in mind, let's proceed.
On your Apple computer, connect an NFTS-formatted drive to an external port. Take note of the volume name, as you'll need it later.
Launch Terminal.app and type in the following command, entering the admin password when prompted (Figure A).
sudo nano /etc/fstab
Figure A