Hey. Wasn't sure where to post this, figured I would here since it is specific to my iMac 5K. Specs are 3.5ghz i5, 16GB memory, r9 290x, running now the full version of 10.11. Its a weird issue. When I open up iTunes and click on the New tab. There is the featured section at the top you can arrow through & it automatically skips to the next featured album or artist. (Attached a picture for reference) It is very choppy on my iMac 5K. Every time it skips to the next slide my Cpu usage for iTunes spikes to around 50-80 percent for a second. And the frames are very slow on the transition. Even if I minimize iTunes on this page I can still see the CPU usage spike when it switches. I have a 2012 iMac 21.5in also. It is silky smooth on that device. Still running 10.10.5 on that. That display is of course a lot lower resolution. Wondering if this is normal because of the 5K and if anybody else is experiencing this. I have noticed it for some time. But I was on 10.11 beta. Was just waiting for the public release of 10.11. Installed that, but same issue. Any help or comments are appreciated. Thanks.