this is not a mac question you idiot..
.rar's are just compressed files, and you need to un-compress them to get your audio tracks out. You do this by getting unrarx or a similar program.
Goggle "unrarx" download it, then open the .rar files with unrarx
https://www.newschoolers.com/web/forums/readthread/thread_id/454545/
^notice how the thread is still active too..