Three days are passing in one second in slow speed, around 4 or 5 in normal speed, I tried to find how to fix that in DosBox, I even installed Boxer thinking it would be easier but I'm not a computer guy, it's too complicated for me.
If somebody could give me a tutorial on how to slow the game down on Mac, I'd really appreciate it.

I don't know how DosBox is on Mac but the the game run too fast because the CPU cycle is too high. To reduce the CPU cycle, I know on Windows you must press control and f11 at the same time so try that on your Mac untile the game run correctly, maybe it will work.