To do Alt + H + I + L on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, I, then L.
Command: Slides from Outline
This is how to do Alt + H + I + L 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 + I + L opens a file browser to import slides from an outline document. You can select a Word document (.docx), RTF file, or plain text file with headings, and PowerPoint will create slides based on the outline structure. This is a quick way to convert a written outline into a presentation.