To do Alt + H + P on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, then P.
Command: Picture Menu
This is how to do Alt + H + P 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 + P opens the Picture menu, giving you options to insert pictures from Photo Browser, Picture from File, Stock Images, or Online Pictures into your presentation.