To do Alt + m p on Mac in Excel, download and install Accelerator Keys, then press Option, followed by m, and p.
Command: Trace Precedents
This is how to do Alt + m p 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 + m p activates the Trace Precedents command in Excel, providing quick access to this feature from the ribbon.