For best performance, the we recommend you use a graphics card with 512MB video memory (VRAM). 1 GB VRAM is required for rendering 4K projects.
Some Macbook and Mac mini models are not supported due to the more limited feature-set of their built-in graphics accelerators.
You can determine what graphics card is installed on your system by selecting the "About this Mac" command under the Apple menu.
When the system summary appears, click the "More Info..." button, which will launch the System Profiler application.
Graphics cards are listed under the "Graphics/Displays" section of the System Profiler.