Downloading MatshitaFlasher 0.6 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The program relates to System Tools. The most popular versions of the software are 0.6 and 0.5. We recommend checking the downloaded files with any free antivirus. 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 PodManager, which might be related to MatshitaFlasher.