To do Alt + P R C on Mac in Excel, download and install Accelerator Keys, then press Option, followed by P, R, and C.
Command: Clear Print Area
This is how to do Alt + P R C 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 C clears any previously set print area, restoring the default behavior where the entire used range of the worksheet will be printed. Use this when you want to print the full spreadsheet again.