I had a 2012 MacBook i5 and when I build and run even a simple project my computer would run hot. I had never heard the fan until I started using GM. Never new it had a fan until GM 2. Last year I bought a new MacBook i7. If I run a build and leave it and come back she still runs hot but it takes longer. Just wondering if this was a normal thing? Looking at the activity monitor. Gamemaker only uses 8 % of cpu. But when you run the yoyo runner it jumps to 80%.