Quick tutorial for Blender.

Add a cube to the viewport, and go under Edit Mode.

Under select mode choose Face select.

Select the Bevel Tool. Click on any face in the shape and drag to create a bevel, keep on holding and using the numpad +/- keys on an Apple Magic keyboard with numpad. you can easily add/remove segments.

Another option that I couldn’t make work is using F6 key. If you know how to this on a Mac please do let me know.