To do Alt + M U I on Mac in Excel, download and install Accelerator Keys, then press Option, followed by M, U, I.
Command: Min
This is how to do Alt + M U I 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 U I inserts a MIN formula in the selected cell. This function finds and returns the smallest value in a range of cells. It’s useful for identifying lowest values, minimum amounts, or bottom scores in your data.