To do Alt + H + 7 + M on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, 7, then M.
Command: More Spacing
This is how to do Alt + H + 7 + M 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 + 7 + M opens the Font dialog box with the Character Spacing tab selected, allowing you to set precise spacing values. You can specify exact point values for expanded or condensed spacing.