To do Alt + J I I M on Mac in Excel, download and install Accelerator Keys, then press Option, followed by J, I, I, M.
Command: Ink to Maths
This is how to do Alt + J I I M 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 + J I I m converts handwritten mathematical expressions into formatted equations. Write out formulas, fractions, integrals, or other mathematical notation by hand, Excel will recognize and convert them into properly formatted mathematical expressions.