To do Alt + P R on Mac in Excel, download and install Accelerator Keys, then press Option, followed by P and R.
Command: Print Area
This is how to do Alt + P R 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 R opens the Print Area menu with options to set or clear the print area. Setting a print area limits printing to only the selected cells, useful when you only want to print a specific portion of your spreadsheet.