Look at the Speco DVR DVR4TN8TN16TN160. They just recently released a Java App that will allow you to remotely and locally view their DVR on Mac.
This is the only DVR I know of with this capability.
I am sure you know this, but I have also tried to use Crossover application on Mac to run native IE 7 in Mac OSX and it does not work. The only other way is to use Parallels and run Windows XP.
This is an issue that needs to be addressed by manufacturers ASAP. There is a growing number of Mac users and they are a legitimate size of the computer population now and need to be addressed as such. Hopefully we will see this change very soon.
