To do Alt + N S 3 S on Mac in Excel, download and install Accelerator Keys, then press Option, followed by N, S, 3, and S.
Command: Stock 3D Models
This is how to do Alt + N S 3 S 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 S 3 S opens Microsoft’s stock 3D models gallery where you can browse and insert pre-made 3D objects. Categories include animals, anatomy, buildings, electronics, and more—all free to use in your spreadsheets.