Set up and switch to the Ainu input source on Mac
You can type Ainu using the Ainu input source.
On your Mac, choose Apple menu > System Settings, then click Keyboard in the sidebar. (You may need to scroll down.)
Go to Text Input on the right, click Edit, then in the dialog that appears, click the Add button in the sidebar.
Select Ainu from the list of languages on the left (use the search field or scroll down).
On your Mac, do any of the following to switch to the Ainu input source:
Use the Input menu: Click the Input menu in the menu bar, then choose the Ainu input source. If the input source is dimmed, the current app doesn’t support it.
You can also press Option-Control-Space bar to select the next input source in the Input menu, or Control-Space bar to select the previous input source.
Use the Caps Lock key: If you set an option in Input Sources settings to use the Caps Lock key to change input sources, press the key to switch between a non-Latin input source (such as Ainu) and a Latin input source (such as English).
To check your Input Sources settings, choose Apple menu > System Settings, then click Keyboard in the sidebar. (You may need to scroll down.) Go to Text Input on the right, then click Edit.
Use the Fn key or : If you set an option in Keyboard settings to change input sources by using the Fn key or (if available on the keyboard), press the key to display a list of your input sources, then continue pressing the key until the input source you want to use is selected. The list disappears automatically.
To check your Keyboard settings, choose Apple menu > System Settings, then click Keyboard in the sidebar. (You may need to scroll down.)
Use the Touch Bar: If your Mac has a Touch Bar and you customized the Control Strip by adding the Input Sources button , tap the button, then tap the Ainu input source. To learn how to change the Control Strip, see Customize the Touch Bar.