Are you looking for a DFU tool on the MacBook ?

A simple DFU tool run on the OS/X (MacBook)

Features:

  1. Easy to use without bluetooth dongle or cell phone.
  2. Auto upload a selected firmware, when a device be detected which in the DFU mode.
  3. Multiple devices can be uploaded in the same time.

Video: https://www.facebook.com/ucxpresso.nrf/videos/1179363852146551/