To do Alt + P V G on Mac in Excel, download and install Accelerator Keys, then press Option, followed by P, V, and G.
Command: View Gridlines
This is how to do Alt + P V 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 + P V G toggles the display of gridlines on your worksheet. Gridlines are the faint lines between cells that help you see cell boundaries. Hiding them can give your spreadsheet a cleaner look for presentations.