Mac OSX Mavericks - Export High Resolution Video - No Frame Skipping

Hi All,
I am experimenting with unreal engine on Mac OSX Mavericks.

I am looking to export a 1920x1080 30fps matinee from Unreal 4.8. When I use the “Movie” button, the rendering comes out pretty choppy. I have a decent GTX graphics card, quad core i7 processor, and a solid state hard drive.

I found this for windows that people claim to have made work: (this might be a bit dated)
https://udn.epicgames.com/Three/CapturingCinematicsAndGameplay.html

Does anybody know of the Mac and Linux equivalents to this command line export?

Thanks a ton!

Hate to bump this, but does anybody have any experience with the above problem or could offer a pointer in the correct direction?

Much Thanks!