There was a time when I would have answered a thread like this with "Transmission" as my app of choice, however I have recently given up on the application. It worked flawlessly for some time, then suddenly with an update, it continuously crashed OS X, making the entire system unresponsive. I would be forced to do a hard restart by holding the power button. I searched for a solution and discovered it was a terrible bug in an update that caused the problem. Switching to an older version I had did not seem to help, and I was out of options until they released a patch to remedy the problem. The problem was fixed, however you could not run more than 2 torrents at a given time or it would happen again, which was fine by me. I ran only one at a time, which was more than enough to get by, but recently Transmission failed to work properly. Once again it froze OS X, and upon rebooting, froze it again not 5 minutes after running the app. I closed Transmission for good, I will completely remove it from this system and it will never come back. What are the best OS X Torrent apps out there that you people use besides transmission? I will never use that particular app again. I searched and found: Xtorrent which I have never heard of before, so I assume it is new. Is it reputable ? Tomato torrent - kind of a funny name uTorrent - I've heard this name before. Azureus - I think I used a similar program on windows once.