itunes not plying HDCP on yosemite
I've recently upgraded to Yosemite (for a good apple customer) on my iMac, everything works fine, the phone calls handoff is cool. But now the problem is that iTunes AND quicktime won't play the shows. There is the HDCP error, so I tried to play the SD format and got the same error. I searched around for answers but people only ask because of a second monitor, which I don't use, just on the native screen. I've restarted the SMC several times, and still nothing, reinstalled iTunes 12, same error. so I have a theory that its the "connection" between intel CPU to yosemite to the AMD graphics in HD. But when I share the library to my macbook air in Yosemite also (early 2014, 11"), the shows play fine, probably because both graphics and CPU are intel. I might have forgot something here, but any solutions?
iMac mid-2011
Processor
2.5GHz quad-core Intel Core i5 with 6MB on-chip shared L3 cache
Graphics
2.5 GHz
AMD Radeon HD 6750M graphics processor with 512MB of GDDR5 memory
iMac, OS X Yosemite (10.10)
