Best computer program for Apple IMAC

Hi there, I am ripping all my cd's to my computer and am wondering what the best program is that is Apple Complatible

Oh i dont want to record anything higher than CD Quality (SACD or DVDA) Will I benefit from upsampling? I kind of figure KISS (Keep it simple stupid) but digitals pretty complex and I dont want to try wrap my head around that one (Circuit boards, caps, tubes, I can get into)

I appreciate all your help Toby