Maybe I'm missing something, but is there a way to watch cable tv on an imac? I tried looking for the answer here but it's still not clear to me. I have a24" 2.4 GHz imac and a Time Warner cable setup. I get the HD package also. So my question is this: is there any hardware to connect the cable box to the imac and if so, can I get HD via the imac?
For Mac, Elgato EyeTV Hybrid is what you want, but you're not going to be able to do everything you'd like. The Hybrid can tune Digital over-the-air signals (ATSC), Analog over-the-air and analog cable (NTSC), and unencrypted digital cable (Clear QAM). The catch is that with digital cable, most markets don't get very many Clear QAM HD channels. Usually it is the network stations (ABC,NBC,CBS,FOX,CW, etc), plus maybe a few others like Discovery HD. Channels like ESPN and ESPN 2 HD, premiums channels, etc, are going to be encrypted. This means not only can you not record them, you can't even watch them on your iMac. If you get the analog channels (I think no matter what, everyone gets the analog cable stations?), you can watch those on your iMac, but it will look like crap. I would Google somethink like "Time Warner Clear QAM channels" plus whatever market area you live in, and you should be able to find some discussion or list of what Clear QAM channels you recieve.
I will say that what EyeTV does, it does very well. The software interface is nice and works very well. I use a Hybrid to watch OTA HD on my iMac, and I love it. I've never had it crash or miss a recording. The freedom to do "as you please" with your recordings (edit out commercials, export to iPod, DVD, downsize, offload to external drive, etc) is very nice.
The reality of trying to watch HD cable on any type of computer, Mac or otherwise, is not pretty. Every solution requires compromises. The only solution that allows you to watch and record what you want, without restrictions and full access to the original full quality recording, is a hacked cable box that will output over firewire. The problem is that buying a hacked box is both expensive and probably illegal. The only legal option for watching HD cable in it's original quality on a computer is to buy a pre-built Windows Vista Media Center PC that includes a CableCard and tuner from a manufacturer like Dell or HP, which is certified by CableLabs. Even then, it's really just a glorified TiVO - you can't do things like export to iPod, burn to DVD, etc. There is a product called Hauppauge HD-PVR which is reportedly getting EyeTV software support soon, which would allow you to watch analog HD (via component video cables) on your iMac, but then you're still not getting the original digital recording, and you have to go through your cable box as an intermediary.