Long and short of it, I have used kJams for several years now, I was one of the early testers for Dave and his product, I've been a KJ for 15 years and I have used kJams professionally for karaoke as wells as for handling backtracks for a lounge act as well as my own online lounge act -- there is no other karaoke hoster, OS X or otherwise, period. No other program offers the features, versatility, polish, presentation, intuitiveness or the capabilities of kJams. This includes the Windows platform as well where I used several hosting programs. No other program parses a massive library in not time at all. Screwed up your library or rebuilt your drive? Re-index the whole dang thing in minutes. Have a singer who sings the same 5 songs every time and is particular about the version? His favorites are in there waiting for you just to click on "here". Have a venue that's just once a month with a core group of folks who always sing the same thing every time? No problem, they're all right there with their favorites and they're not cluttering up the favorites from your weekly gigs. Most of us spend half our lives ripping as well, I did too before I ripped with kJams. Most hosters won't even touch ripping and kJams gives you the best ripper there is period. Anal about your sound quality and want everything in AIFF or WAV? No problem. Like LAME at 128? No problem. Tired of zipping CDG files to compressed files, organizing folders, keeping them all sorted and named the same thing? No problem, kJams rips and sorts your library just like iTunes does. Did I mention integration with KJ Pro so you can keep your song book organized while you rip? Pure genius. Dave is a diligent and attentive developer, he's constantly working on his product to make it better and he's there to fix it when something goes wrong. He communicates well with users finding out what we want in our karaoke program and doing what it takes to get those features integrated into the product. As I stated earlier, there is no other hoster professional or otherwise, OS X or Windows, that measures up to kJams. Look no further.