To do Alt + L I on Mac in Excel, download and install Accelerator Keys, then press Option, followed by L, I.
Command: List Box (Form Control)
This is how to do Alt + L I 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 + L i inserts a List Box form control. List boxes display a scrollable list of items that users can select from. Unlike combo boxes, list boxes show multiple items at once and can be configured to allow single or multiple selections.