no bootable device when installing windows on mac

I opened Bootcamp Assistant, partitioned my hard drive, inserted the Windows 7 DVD, and selected the 'Start Installation' option. The DVD's contents and the ISO file's contents looked virtually the same when I viewed them in Finder. The Mac then burned the ISO image to a DVD for me. So, after I downloaded it, I right-clicked on the ISO file's image, then selected the 'Burn.to disc' option. However, to install it using Bootcamp, I had to make a copy of it on DVD. I downloaded it to my Mac as an ISO file. I purchased my copy of Windows 7 (64 bit) online from the Microsoft store web site. After several hours of troubleshooting on my own, and several more hours of fruitless troubleshooting with a Mac customer support rep, I finally found a solution.

Like other people whose postings I've read on several web sites, I too got that aggravating 'No bootable device.' error message from my Mac (in this case, a Mac Mini running OS X 10.6) when I tried to install Windows 7 using Bootcamp Assistant. Bootcamp 'No bootable device' message when trying to install Windows from a DVD

No bootable device when installing windows on mac