To do Alt + h n on Mac in Excel, download and install Accelerator Keys, then press Option, followed by h, n.
Command: Number Format
This is how to do Alt + h n 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 n opens the Number Format dropdown menu where you can choose from common formats like Currency, Percentage, Date, and more.