Due to some hardware issues with my laptop PC, I'm temporarily moving from Ubuntu to Mac OS X. But first, I need to move all my files to this Mac machine. For different reasons I don't want USB external drives with NTFS, so I formatted my external drive as ext4. This is a small HOW-TO for enabling ext2/ext3/ext4 drives on your Mac.
Note: I did this on a G5 with Mac OS X v10.4.11.
Step 1
Install MacFuse from http://code.google.com/p/macfuse/
Step 2
Install http://alperakcan.org/?open=projects&project=fuse-ext2
Step 3
Enjoy.