To do Alt + H + 1 on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, then 1.
Command: Bold
This is how to do Alt + H + 1 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 + 1 toggles bold formatting on the selected text. Bold text appears with thicker strokes, making it stand out and emphasizing important content in your presentation.