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I use C1 in sessions with a 13" 3.0 i7. Runs fine. In the develop module its comparable to Lightroom (use for DAM and non-XTrans edits) or Aperture (used to use). I have no doubt that throwing a discrete GPU at it might speed things up, but that's like saying a Mac Pro would speed things up. It's what you are satisfied with. For me, Iris is fine.
 
Does anybody being able to confirm the new rMBP 15 (Mid 2015) with the dGPU R9 370MX performance and compatibility with Capture One Pro 8.3.1?
 
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