On your Mac, go to arduino.cc, click on "Software", then under the Download Options section, click the link for the Mac version for either Intel or Apple Silicon.

The official Arduino team responsible for the development of the official range of Arduino hardware and software, have this week announced the availability of the latest Arduino IDE 1.6.9 software ...

The new Arduino IDE 1.6.2 features a one click install of boards and libraries and now includes two new menu items in the form of “Sketch > Include Library ...