Write To NTFS Drives With OS X Lion
After upgrading my Mac from OS X 10.6.8 Snow Leopard to OS X 10.7.3 Lion, I discovered I could no longer write files to external NTFS-formatted drives. The problem is MacFUSE which, I found out, does not support the new 64-bit kernel. If this is happening to you, you must remove the old MacFUSE and install the newer version, which does support the 64-bit kernel. Here's how.
Until recently, the only way to fix MacFUSE's incompatibility with Lion was to install Xcode and Macports and compiling a bunch of code. None of that is necessary anymore. To get NTFS file systems into read/write mode I recommend removing the old MacFUSE (only if you used it before upgrading to Lion). If the uninstall button in the preferences panel doesn't work, control click on the preferences panel icon and select remove. Reboot your machine.