To do Alt + W G on Mac in Excel, download and install Accelerator Keys, then press Option, followed by W, G.
Command: Zoom To Selection
This is how to do Alt + W G 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 + W G zoom To Selection enlarges the view to fill the screen with the selected range. This is useful for focusing on a specific area of your worksheet.