(There's no video for Mezzo 4.7.4 yet. Please contribute to MR and add a video now!)
Mezzo runs in tandem with other digital media applications, scanning, processing, and transferring data in the background, archiving & databasing complex projects of audio/video workstations for digital media professionals. It can backup and restore to many popular data tape formats and optical discs
Version 4.7.4 was the final release of this program (afaik)
(15.94 MiB / 16.72 MB)
Mezzo 4.7.4 installer / DMG image
(3.77 MiB / 3.96 MB)
Mezzo 4.7.4 Documentation
Mac OSX 10.3 is listed as the minimum supported and Macintosh G4 or higher for hardware.
The publisher disappered from the web in late 2006 or early 2007. This version is copy protected and requires either a challenge / response or an iLok with authorization. The standard license required re-authorization every 6 months. Many users were left high and dry when their authorization expired and the company stopped providing new ones. Users with years of archived projects could no longer access them. As far as I know, there was no notice given to users when they shut down. My impression is that they simply walked away with no concern for their customers.
Mezzo was most commonly used to back up ProTools and Avid Media Composer projects. It could also read project files from a number of other Audio / Video creation programs.
Emulating this? It could probably run under: QEMU