I've been researching the issue for most of the day, and from what I can tell, Renpy 7.4.0 (which was used to make V.I.R.T.U.E.S v10c) had an issue with builds on Mac. Renpy 7.4.1 supposedly fixes that, but when I try to create a Mac build using Renpy 7.4.1 and the PC build's files as a source, I end up with a build that runs fine from the Renpy SDK's Launcher, but crashes with a "Unexpectedly Quit" error. I was able to run a Mac build of another Renpy game (version 0.7b of Insight Of You) without error. Just a quick comparison of the script_version.txt files between the two games shows that Insight Of You was built on 7.4.1. I unfortunately don't have enough knowledge of Renpy to troubleshoot any further.