I usually do use the browser version, but I wanted to try to download it. One thing I notice that is different is that in the video I linked there are two files in the MacOS folder, but seeing as how this issue is limited to few macs, I would assume that isn't the problem, but I wouldn't put it out of the question, so perhaps it's the lack of a Launcher.dat file or something. But here is to hoping that I can find a solution to this new problem as well. Thank you for helping out!