I have used a SignalLink USB with my MacBook and it works fine out of the box (no driver installation necessary). What I like about this interface is that you can control the RX and TX
sound levels from the front panel of the interface without having to worry about messing with software sliders controls and the interface i is powered by the computer through the USB interface cable so there are only two cables needed (USB from computer to RIG, and the cable from the interface to the RIG). I recommend getting the mini DIN cable (I use it on my FT-897 and FT-817) as it is very convenient and doesn't require disconnecting and reconnecting the Mic if you want to do some SSB.
I recommend that you give Fldigi a try. It is a very good multimode
program and it runs equally well on Mac OS X, Linux and Windows.
Best of luck with your quest for RTTY DXCC !
I use a Keyspan adapter and run MacLoggerDX - and all is well. I'm thinking about going to HRO tomorrow to pick up a Signalink USB. They only have the Yaesu 8 pin mic cable in stock - but I could easily change the cable to connect to the FT-2000 5 pin din connector.
Any thoughts? I'm interested in going RTTY so I can achieve RTTY DXCC.