To do Alt + N N S on Mac in Excel, download and install Accelerator Keys, then press Option, followed by N, N, and S.
Command: Icons
This is how to do Alt + N N 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 N S opens the Icons gallery where you can browse and insert vector icons into your spreadsheet. Icons are scalable graphics that can be resized without losing quality, perfect for creating visual documents and dashboards.