bootcamp does not download support software windows
I cannot succesfully install Windows 7 Home Premium on a 27" iMac (Late 2009)
Nor does bootcamp download support software. It searches, but says not available
iMac, OS X Mountain Lion (10.8.2)
Sometimes the servers are down, and you get that error. Be patient and keep trying. Wait a day or two. Or see the following article for a quicker solution: Mac OS X Lion, Snow Leopard, Leopard - Download Bootcamp Drivers.