To do Alt + N C B on Mac in Excel, download and install Accelerator Keys, then press Option, followed by N, C, and B.
Command: Insert Checkbox
This is how to do Alt + N C B 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 C B inserts a checkbox control into the selected cell. Checkboxes are interactive form controls that toggle between checked and unchecked states, useful for creating to-do lists, tracking completion status, and building interactive dashboards.