The Arduino Uno uses a driver provided by the MacOS operating system, so there is nothing to install.
Now that the IDE is installed, connect your Arduino Uno to your Mac via a USB cable.
The green LED labeled PWR on the board should come on, and the yellow LED labeled L should start blinking.
NOTE
You might see a pop-up window telling you that a new network interface has been detected.
If that happens, Click Network Preferences, and when it opens, click Apply. The Uno will show up as Not Configured, but it’s working properly. Quit System Preferences.
Now that you’ve configured the software, you need to select the proper port to communicate with the Arduino Uno.
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