After installing Node.js on your Mac, proceed to open your command-line application and input the following command:

$ sudonpm install -g ionic

After inputting this command, you will be prompted to input your password as shown in the following screenshot:

If you have already set up the permissions for npm on OS X, you can install Ionic with the following command:

$ npm install -g ionic

The preceding command line should result in the following output:

Installing Cordova on OS X is very similar to installing Ionic. You can run the following command to install Cordova:

$ sudonpm install -g cordova