Mac OS X does a good job of working with a wide variety of disk formats. It can, for example, read and write disks formated using FAT32, which absolutely compatible with all Windows operation systems. But using FAT32 has several disadvantages. FAT is much slower, then NTFS and the maximum file size in FAT32 is 4 GB. Also it has a weak security and in not so stable as NTFS.
But Mac OS X cannot write to NTFS. So an additional software was developed, called MacFUSE which makes it possible to use any FUSE (File-system in USErspace) file systems in Mac. And the most useful FUSE is the NTFS-3G Read/Write Driver, which ables system to load NTFS with read and write capability. This is truly the greatest news for dual booting Mac OS X and Windows XP or Vista.
Do install MacFuse simply download this file MacFuse download and ran the installation wizzard
After installation will be completed download, unpack and install NTFS-3G Read/Write Driver.
And that is all. Now MacOS can read and write to NTFS partitions without any problems.