"GarageBand" came with your Mac and will handle the software but you may want something more powerful. Audacity is a free program that offers a bit more and there are many pro level programs since the Mac is the choice of the pros. The full blown versions are expensive but most offer a stripped down version that will be more than enough for recording 2 channels and the outboard Analog/digital converters usually come with Mac software. I would go with a firewire model since Apple has embraced that interface.
On the cheap you can feed analog straight into the iMac and use GarageBand, no cost. Beyond that there are a ton of analog/digital converters and programs available. Go to Musicians Friend website to see the scope. Apogee Duet gets good reviews as mid/high level unit at $500 but I have no personal experience.
Visit the vinyl asylum at AudioAsylum.com and search around for some good ideas.
On the cheap you can feed analog straight into the iMac and use GarageBand, no cost. Beyond that there are a ton of analog/digital converters and programs available. Go to Musicians Friend website to see the scope. Apogee Duet gets good reviews as mid/high level unit at $500 but I have no personal experience.
Visit the vinyl asylum at AudioAsylum.com and search around for some good ideas.