You need to go to the control center for parallels and click on the "gear" icon in the pop-up window, this will take you to a window that you can find the graphics settings and cpu and memory settings. Here you can adjust the graphic memory to allocate up to 2gb of memory. That is that max parallels will allow you to use from your pro, I have 8gb on mine and can only use the max of 2gb which works in smaller scenes in lumion. I have boot camped a small portion of my computer to allow more intense lumion sessions where it can utilize the full capability of my MBP. you will want to adjust the memory as well and use the slider to go to the max suggested, but do not go over.