The 0.6 version of MatshitaFlasher for Mac is available as a free download on our website. The program is included in System Tools. The most popular versions among the application users are 0.6 and 0.5. The actual developer of this free software for Mac is Marshal Kirk McKusick.
From the developer:
MatshitaFlasher - A Utility to Dump and Flash files for the MAC.
Load it with the desired firmware, and voila, your player would be region free.
This release supports flashing of the firmware binaries embedded in the apple firmware updates released by ben11.
You may want to check out more software for Mac, such as Macfilink, Missing Sync for Palm Pre or Sesamouse, which might be related to MatshitaFlasher.