I just checked the macOS / FreeBSD man page for ‘stat’, and noticed the syntax differs from the version in GNU coreutils (which is what’s used in Linux). That’s probably the only thing that would need to be changed to make the script work on those other systems. It’s on line 526.

If you have the original disc, then yeah. The script is more meant for when you get CUE/BINs online, such as Redump disc images for example.