Change how VoiceOver pronounces text and symbols on Mac
Specify how you want VoiceOver to pronounce certain text or symbols by providing substitutions for them. For example, you can substitute “8 oh 2 dot eleven b” for “8 zero 2 point one one b.”
Note: VO represents the VoiceOver modifier. See Use the VoiceOver modifier.
Open VoiceOver Utility (press VO-F8 when VoiceOver is on), click the Speech category, click Pronunciation, then click the Add button .
In the new row, type the text whose pronunciation you want to customise, press Tab to move to the Substitution column, then type how you want VoiceOver to pronounce the text.
To specify an app where VoiceOver should use the pronunciation, choose the app from the pop-up menu.
The menu lists open apps and Find App, so you can select an app that isn’t open. To use the pronunciation in any app, leave All Apps selected.
To have capitalisation ignored, select the Ignore Case checkbox.
You can customise pronunciations by using the commanders to assign the Add Pronunciation command to a key or gesture. The command displays a dialog to add a new pronunciation, which is added to the list in the Pronunciation pane.