1. Install MacFUSE or osxFUSE
  2. Install fuse-ext2
  3. Edit auto-mount script for read/write access

/System/Library/Filesystems/fuse-ext2.fs/fuse-ext2.util: line 207

# OPTIONS="auto_xattr,defer_permissions"  
OPTIONS="auto_xattr,defer_permissions,rw+"  

source

Tags: osx, mac