Thanks for tips. And much thanks for forum link! You know UE should include a Mac users section for getting started guides. Most of tutorials show both commands for hot keys but they don’t take Trackpad users into account.
I went and applied most of your suggestions. I also tried switching Quality to 2D / 3D Scalable in Project Settings.
Engine Scalability Settings - Auto detect quality put my machine in mostly Medium settings with a Low for Particle Effects.
Note even after applying changes and relaunching UE4Editor… CPU fan gets really loud. If I switch window to Safari fan speed goes back to normal. This is really strange. It’s not like I’m playing game in simulation. After a few moments of switching windows you will hear fan ramping up in RPMs.