To do Alt + h f k on Mac in Excel, download and install Accelerator Keys, then press Option, followed by h, f, and k.
Command: Decrease Font Size
This is how to do Alt + h f k 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 + h f k activates the Decrease Font Size command in Excel, providing quick access to this feature from the ribbon.