Been doing OK with Sierra on my 13 inch Macbook Pro 2011 (SSD and 8GB RAM). I love the new Reduce motion feature but after 20 minutes of using in fullscreen apps, I am presented with a black screen and logged out. This happens when i move my cursor to unhide the menu bar. I tested this many times and it always comes back even with resetting SMC, PRAM, Repairing disk permissions, and even reinstalling. Turning off Reduce motion is a temporary solution but I hate the frame drops when switching spaces and opening mission control. Any help is appreciated 🙂