To do Alt + M T on Mac in Excel, download and install Accelerator Keys, then press Option, followed by M, T.
Command: Text Functions Menu
This is how to do Alt + M T 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 T opens the Text functions dropdown menu in Excel’s Formulas tab. This menu contains functions for manipulating text strings including CONCATENATE, LEFT, RIGHT, MID, TRIM, UPPER, LOWER, TEXTJOIN, and many others for text processing and data cleaning.