Use the Cangjie input source
With Cangjie, you can enter Traditional Chinese characters. Make sure you are familiar with Cangjie input code principles and the keyboard layout.
Trending Chinese words and phrases, which appear as typing suggestions in the candidate window (and the Touch Bar, if you have one) as you type, are regularly updated automatically in the background.
Enable and switch to Cangjie
Enable Cangjie: Choose Apple menu > System Preferences, click Keyboard, then click Input Sources. Next click the Add button
, select “Chinese, Traditional,” select Cangjie, then click Add.Switch to Cangjie: Choose it from the Input menu in the menu bar.
Note: If your Mac has a Touch Bar, you can customize the Control Strip by adding the Input Sources button
and the Handwriting button 
. For more information, see Customize the Touch Bar.Show the Cangjie keyboard layout: Choose Show Keyboard Viewer from the Input menu.
If the command isn’t shown, choose Apple menu > System Preferences, click Keyboard, click Keyboard, then select “Show keyboard and emoji viewers in menu bar.”
Set preferences
Click the Input menu in the menu bar, choose Open Cangjie Preferences, then set the following options, as needed:
Candidate window: Specify the orientation (horizontal or vertical) and font size to use in the Candidate window.
Show predictive completions: Show predictive completions in the Candidate window as you type.
Show candidates while typing: Show the Candidate window automatically after typing an input code. If you deselect this option, press the Space bar after typing an input code to open the window.
Enter characters
Make sure Cangjie is selected in the Input menu in the menu bar.
Note: If your Mac has a Touch Bar and you customized the Control Strip to add the Input Sources button , tap it to select Cangjie.
Cangjie: Enter the Cangjie codes for the characters you want to use, then press the Space bar to insert each character in your document. If the Candidate window appears, select a character in the Candidate window.
For example, to enter 蘋果公司, type “廿卜竹金” (tyhc), the Cangjie code for 蘋, then press the Space bar. Follow the same procedure to enter 果 (type “田木”, wd), 公 (type “金戈”, ci), and 司 (type “尸一口”, smr) in order.
Enter characters when you don’t know complete codes: Use the Z key, the Cangjie function key, in place of any unknown keys.
For example, if you aren’t sure of the second key for 蘋, you can enter “廿重竹金” (tzhc). Candidates that match the three known keys are shown in the Candidate window. You can use the key multiple times in the same Cangjie code, as in “廿重竹重” (tzhz).
Enter English words
Enter an English word, then select the word in the Candidate window. For example, type “ipad”, then select the word in the window. Proper nouns are automatically capitalized.
Use predictive completions
If you set the preference for predictive completions, the Candidate window displays predictive completions as you type.
Type an input code, then select a candidate in the Candidate window.
Select a predictive completion, if available, in the Candidate window.