Just upgraded to Photoshop CC, vram help needed.

Question

and get error regarding vram needing to be 512. I have 2 NVIDIA cards - one with 256 the other with 512…any help to resolve this?

Answer 1

Exactly what model Mac are you using?  (Apple > About this Mac > System Report > Hardware > Model Identifier)
If it's a MacBook Pro, you are probably talking about having 2 GPUs - an embedded GPU and a discrete GPU.    You can only select (use) one at a time; the place to select the GPU is (strangely enough) in System Preferences > Energy Saver:
Better Battery Life = embedded GPU,
Higher Performance = discrete GPU
If you are currently using the discrete GPU, try switching to the embedded GPU.  The embedded GPU uses system RAM as VRAM and will dynamically allocate what it needs, it will allocate more than 512MB if necessary.  The discrete GPU has its own dedicated GPU, in your case limited to 512MB.  Both should work with Photoshop, but CS6 and hence CC require 512MB minimum.
I'm running a 2009 MBP with the nVidia 9500m + 9600m GT and it runs Photoshop CS6 fine.  256 MB VRAM.  But I'm not running Photoshop 3D - is that what you are using?