I spent about 45 minutes with tech support to no avail. It has been confirmed through tech support that my MacBook Air does meet all system requirements for PS CC and to use the 3d feaures. However, I can't. I get a few error messages. One is "Could not complete the new 3d extrusion because there is not enough memory (RAM) - but they (Adobe support) confirmed there is enough memory. Another error message I get is "your start up disk is full". Basically a lot of the 3d features are not available. They couldn't come with a solution to any of this. I've searched the forum and didn't see anything. After 45 minutes with tech support they said this is a "common" problem with MacBook Air users and Mac Pro users. Yet I couldn't find anything on it. Any ideas? 
Disappointed yet again...
Vivian