My 2011 Macbook Pro recently died and I am about to replace it. I need to choose between a 2015 Macbook Pro with integrated Intel Iris Pro graphics and a more expensive model that also has a separate AMD Radeon R9 M370X graphics card.
Has anyone ridden Zwift using a Macbook with just the Intel Iris Pro graphics? What was your experience? If that is sufficient for Zwift, I would go that route rather than spending an additional $420 to get the AMD Radeon.