How to pinch out in iOS simulator when map view is only a portion of the screen?

Solution 1:

You can move the two gray circles that represent your fingers around the screen by holding Option and Shift and moving the mouse.

Solution 2:

Try double tapping with the option key pressed. On the iPhone this causes the MKMapView to zoom out.

Solution 3:

Only pressing the alt key made the two gray dots representing your fingers appear for me...

Solution 4:

You can use Option (Alt) button or combination of Option button and command button along with mouse movement to zoom in and zoom out a map or an image.