Open iOS Simulator from Command Line

The Simulator.app from xcode can be opened from command line without opening the xcode itself.

Open Simulator

To do so is simple, just run the following command:

open -a Simulator

If your xcode is properly installed and you accepted all the license agreement, you should be able to see the simulator app opened now.

Change Device

You'd see a latest model of iPhone simulator opened by default. If you want to change the device, click File in the menu bar, then select Open Simulator > the open another simulator with the model you want.