Finding a 64-bit Oscilloscope on Mac is pretty slim pickings as far as choices go. Besides Blue Cat, Oscarizor is the only other choice and a lot cheaper as well. I just love all of the functions you can do with Oscarizor, it really helps me see in detail the information i'm looking for. Sugar Audio are always coming up with updates as well, (all the way on 3.0) now with 3D as well as waterfall options for even more detail. There are a lot of options to choose from to get your multi analyzer to your personal preferences too, as well as changing the resolution of Oscarizor to your liking with very low CPU usage. Oscarizor is hands down my favorite Audio Multi-Analyzer.