To do Alt + N P O on Mac in Excel, download and install Accelerator Keys, then press Option, followed by N, P, and O.
Command: Place over Cells Menu
This is how to do Alt + N P O 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 + N P O opens the Place over Cells picture submenu, allowing you to insert floating images that sit above the worksheet. These pictures can be freely positioned and sized independently of cells, making them ideal for logos, diagrams, or decorative elements.