To do Alt + H + 4 on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, then 4.
Command: Strikethrough
This is how to do Alt + H + 4 on Mac in PowerPoint with Accelerator Keys, the native ribbon and alt key shortcut solution for Mac users who get more done with PowerPoint.
Alt + H + 4 toggles strikethrough formatting on the selected text. Strikethrough draws a horizontal line through the text, commonly used to indicate deleted or outdated content.