Mac OS X does not support writing to Microsoft Windows formatted NTFS volumes out-of-the box. The solution is here. Tuxera NTFS for Mac is our commercial read/write NTFS software for Mac users. It builds upon the proven stability of Tuxera's popular open source NTFS-3G to deliver a full featured, commercial grade NTFS driver for your Mac. With Tuxera NTFS for Mac you can access your Windows disks as easily as any Mac disk. Tuxera NTFS for Mac delivers the fastest NTFS data transfer speeds you can have on Mac while protecting your data with its new, smart caching layer.

System requirements
An Intel or PowerPC Mac
Mac OS X 10.4, 10.5 or 10.6
Works with both 32-bit and 64-bit kernels