Hi Jay,

> I've got an iMac with a NVIDIA GeForce GTX 780M 4096 MB.

Normally that should be plenty, but it's possible that the mechanism that MoI uses for running on the Mac is preventing it from accessing the full amount of video RAM and limiting the resolution that you can use for the screen render.


> By the way, maybe there is a discussion somewhere:
> If I got too many objects writing out a .pdf or .ai it is running out of memory.

What do you have for the "Canvas megapixel resolution" on the PDF/AI export options dialog? If you've set it above 30 please try resetting it back to the default value of 30 and see if that makes any difference.

- Michael