To do Alt + P T F on Mac in Excel, download and install Accelerator Keys, then press Option, followed by P, T, and F.
Command: Theme Fonts
This is how to do Alt + P T F 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 T F opens the Theme Fonts gallery to change the heading and body fonts used throughout your workbook. Theme fonts ensure consistent typography across your spreadsheet and make it easy to update all fonts at once.