To do Alt + M X P on Mac in Excel, download and install Accelerator Keys, then press Option, followed by M, X, P.
Command: Partial Calculation
This is how to do Alt + M X 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 X P sets Excel’s calculation mode to Partial. This mode allows Excel to perform partial recalculations, computing only the formulas that have changed since the last calculation. This can improve performance in complex workbooks by avoiding unnecessary recalculations.