To install a Chinese keyboard on your Mac, you'll need to head to System Preferences and click on Keyboard. From there, click on the Input Sources tab and then click the + button at the bottom left corner of the window. This will open up a list of available keyboards, including several Chinese options.
Choose the one that's right for you - Simplified Chinese or Traditional Chinese - and click Add. Your Mac will then download and install the necessary files, and you'll be ready to start typing in Chinese in no time!