It seems really odd that a late 2013 iMac wouldn't be able to run Adobe CC on it - or, at least, wouldn't be able to support Adobe CC with its Graphics card. The graphics card is GeForce GTX 775M, and I've just been told that the software can't be supported by it. Will there ever be support, or an updates that will allow this?
Which program, and have you asked for help in a specific program forum?
This forum is about the Cloud as a delivery process, not about using individual programs
If you start at the Forums Index http://forums.adobe.com/index.jspa
You will be able to select a forum for the specific Adobe product(s) you use
Click the "down arrow" symbol on the right (where it says ALL FORUMS) to open the drop down list and scroll
I do know that "will this card work" questions are common in the Premiere video editing forum, with the answer generally being "yes, if you have a driver that works"
For Windows, do NOT rely on Windows Update to have current driver information
-you need to go direct to the vendor web site and check updates for yourself
nVidia Driver Downloads http://www.nvidia.com/Download/index.aspx?lang=en-us
Mac & nVidia Driver http://forums.adobe.com/thread/1075592