To do Alt + P P H on Mac in Excel, download and install Accelerator Keys, then press Option, followed by P, P, and H.
Command: Print Headings
This is how to do Alt + P P H on Mac in Excel with Accelerator Keys, the native ribbon and alt key shortcut solution for Mac users who get more done with Excel.
Alt + P P H toggles whether row and column headings are included when printing. Enable this when you want the row numbers and column letters to appear on your printed output for easier reference.