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.
On Snow Leopard I used MacFUSE with a NTFS-3G hack. NTFS-3G, a plug-in for MacFUSE, works with the new OS, but MacFUSE doesn't because of its lack of support for the new 64-bit kernel. At least the fix is fairly straightforward. Read on.
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