Download of sfArkXT 1.03 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac app is an intellectual property of melodymachine. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The application is included in Audio & Video Tools.
From the developer:
It's a lossless audio compression format optimized for SoundFont files. sfArk free for non-commercial use. Programs to decompress sfArk files currently exist for Windows, MacOS X and Linux platforms. sfArk almost invariably outperforms typical compression programs such as WinZip and WinRAR - See our comparison.
You may want to check out more software for Mac, such as 4Media Video Converter Standard, ImTOO DVD Ripper Platinum or Trapcode Sound Keys, which might be related to sfArkXT.