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.

Now that you have installed the Arduino IDE, see Blink example for Arduino IDE for steps to run a sample application to blink an LED on your board. Install Arduino (Mac OS X) 1. Download the ...

Arduino has today announced the availability of the latest Arduino IDE in the form of version 1.6.6 which has now been released and is available to download.