To do Alt + H + F + G on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, F, then G.
Command: Increase Font Size
This is how to do Alt + H + F + G 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 + F + G increases the font size of the selected text by one increment. Each press jumps to the next larger preset size (e.g., 12 to 14 to 16), making it quick to enlarge text step by step.