Appium close the simulator automatically though I used --command-timeout 0

Who knows on mac how to stop the appium automatic closing the simulator after a while.
what I tried. I set --command-timeout to 0 on Mac, the simulator still close after 60 minutes.
On windows --command-timeout can solve the problem. Don’t know why it is not working on Mac.

I checked the newCommandTimeout. Still don’t know how to use it. Set it to 0, after a while, the simulator will restart once.
Hope to know how to use newCommandTimeout.