I'm looking for a piece of software (Mac Based) that will do basic things. I'd like to edit EXISTING audio tracks (mp3's). I don't need to create anything. In short, I'd like a program that will allow me to create my "mash-ups" of songs. Using the waveforms to cut portions of songs looping them or moving them around. And changing the BPM's is very important for mixing the songs together. Making a 98 BPM track 101 BPM's, preferebly with pitch adjusting as well. I used Cubase SE for this but there is no version for my Intel Mac Pro and I also just think that software wasn't really meant for that. Can you recommend something?

THANKS