To do Alt + H A S on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, A, and S.
Command: Add-ins
This is how to do Alt + H A 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 + H A S opens the Add-ins panel where you can browse, install, and manage Excel add-ins. Add-ins extend Excel’s functionality with additional features like data analysis tools, templates, and integrations with other services.