If anyone out there has been looking for a PSK31 program for Mac OSX, and, like me, thinks Multimode is too clunky to use and too expensive at $89, there's a very good alternative. It's called CocoaModem and is available at http://homepage.mac.com/chen/Contents/applications.html It's very basic. It does not have a built-in log, for example. And it only does a few modes RTTY, PSK-31 & -63, MFSK-16 and FeldHell. If you must have something equivalent to MixW for Mac OSX, this isn't it. But if you just want a basic, very user friendly, easy to set up, FREEWARE soundcard application that will run efficiently and error free under OSX, check this out. There's a companion app called CocoaPTT that you can use to set up the PTT function using a USB port. I have a RigBlaster Plug&Play, and they now have a Mac OSX driver for it so I am able to use it with OSX in conjunction with CocoaPTT. Apparently these apps by W7AY have been available for about two years now, but I don't know why I never heard of them before. I came across it last week by accident and am very glad I did. I had nearly stopped working soundcard modes because all I have at home are Macs, and although I tried to run MixW2 under a Windows XP virtual machine under Mac Parallels, it always ran very sluggish, could not adjust the input and output sound levels from within XP, and if running any other applications at the same time, had weird timing problems that sent out gibberish. I had basically given up on soundcard modes with my iMac. With CocoaModem & CocoaPTT I'm back in business again!