Can I download the software for Instant DVD+DV from AdsTech on iMac?
You can't download it because the software was CD bounded meaning that it was available with the purchase of a product. From the official specifications, it seems that you can't run this application on an iMac:
Processor/OS: Intel Pentium III 800 MHz or higher or AMD Athlon/Duron CPU
Windows 98 SE, Windows ME, Windows 2000, and Windows XP.
That’s where you are wrong, I am running it on a IMac right now,
Have you ever heard of
VMware Fusion....any thing I can do on windows I can use it on IMac