Use the Sucheng input source
Sucheng is a simplified version of Cangjie. The first and last keys from a Cangjie code are used as a Sucheng code.
A Sucheng code has fewer keys than Cangjie, but more candidates, so it may take more time to select candidates in the Candidate window.
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 Sucheng
Enable Sucheng: Choose Apple menu > System Preferences, click Keyboard, then click Input Sources. Next click the Add button
, select “Chinese, Traditional,” select Sucheng, then click Add.Switch to Sucheng: 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 Sucheng 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 Sucheng 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.
Adjust word frequency: Make the most frequently used candidates appear first in the Candidate window.
Enter characters
Make sure Sucheng 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 Sucheng.
Type the Sucheng codes for the characters you want to use, then press the Space bar to place each character in your document. If the Candidate window appears, select a character in the window.
For example, to enter 蘋果公司, type “廿金” (tc), the Sucheng code for 蘋, press the Space bar, then select the character in the Candidate window. Follow the same procedure to enter 果 (type “田木”, wd), 公 (type “金戈”, ci), and 司 (type “尸口”, sr).
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.