You can always download the Microsoft ActiveX SDK for Mac, learn how to write code and practice until you get it working flawlessly, or pay $40 on the net for some kids ActiveX crossover for Mac and pray it works with the DVR.
Finally, you can buy a DVR that runs on the QT platform such as an Avtech DVR where no long hours of R&D are requried and you can stream video straigh to your Safari browser.
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