This is one of the most ridiculous pieces of software I have ever tried. I run clean system, no third party utilities whatsoever. Everything works perfectly on my MacBook Pro. I have been performing for over twenty-five years, heavily rely on music software for my gigs (experimental classical, electroacoustic) and am quite happy to use even the least expensive shareware programmes such as the marvellous Audio Hijack Pro. But when I see a piece of software which informs me on launch that my Audio Units "failed to validate and will be ignored" I begin to see red. Stay away from this terrible joke of a programme. Spend few more bucks, but get something really reliable and behaving the way software should. Fifty dollars for this? They should pay me fifty dollars for the time I wasted trying to launch that thing. Horrid. Zero stars, period.