To do Alt + N S 3 D on Mac in Excel, download and install Accelerator Keys, then press Option, followed by N, S, 3, and D.
Command: 3D Models from Device
This is how to do Alt + N S 3 D 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 D opens a file browser to select and insert a 3D model file from your Mac. Supports common 3D formats like .fbx, .obj, .3mf, .ply, .stl, and .glb files stored locally on your device.