Just out of curiosity, what was your problem with setting the High Performance GPU
You have to go into the settings and browse through the computer and 'find' Alibre and then add it to the graphics side so that you can edit the graphics. I can't put into words how much I hate PC's but it is what it is. The lack of Mac support is the singular complaint that I have for Alibre. Hopefully by the time my new PC is in need of replacement Alibre will be supported on Macs.