Really bad AA

Hey guys I’m having issues with AA.
I’ve copied (many times) these exact quality settings:

but I keep getting very very bad bad AA. My scene is almost empty: A gym model Plane HDRI Light Reflection Probe Except for the HDRI, which is different, all is like the video and as far as I remember always worked well. Here my results: ![100901-screen-shot-2017-08-30-at-000104.jpg|1276x853](upload://wZn4FlO5ZAmHkf53YncqnA4blD9.jpeg)

My machine is:
iMac 27 inch, 2013
3,5 ghz i7
32 GB RAM
NVIDIA GeForce GTX 4, 780M GB
Mac Os: Sierra; Unity 5.6.1
Can you help me?
Thanks.

It might be your scale slider in the game view is above 1x. Very easy to do as it’s affected by the mouse scroll wheel. The slider is next to the “Maximize on Play” button. Other than that, no idea.