How to set up real-time text (RTT) on Apple Mac?

To use RTT on Mac, users must first set up Wi-Fi calling on iPhone and make sure to add Mac as one of the other devices to be used for Wi-Fi calling.

1. Select the Apple icon at the top left of the Mac, and select System Preferences from the drop-down menu.

2. Click Accessibility.

3. Select RTT in the sidebar and switch to enable RTT. 

4. Toggle "Send now" to send characters as they are typed. 

5. RTT is ready to run on your Mac.