The HD PVR is connected with me on a MacBook Pro 13 ". The supplied software brings me on OSX although nothing at all, but there is the wonderful EyeTV 3 Elgato that the HD PVR support. So I can easily record and process video . The processor load on the Mac Book Pro (2.53GHz C2D with 4GB RAM) is dependent on the selected quality. But even with activated progressive scan and full bitrate 13mbit increases the processor load only to just 50-60%. With the recommended default Settings contrast bored even the smallest MacBook Pro.
The only drawback is the lack of ability on the Mac to update the firmware of the device. Here you have to go well beyond the PC and Win7 or XP.
Otherwise a fine product. We deduct wg. the lack of Mac software from the manufacturer and the high price of about 220EUR.