To do Alt + A R R on Mac in Excel, download and install Accelerator Keys, then press Option, followed by A, R, R.
Command: Refresh
This is how to do Alt + A R R 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 + A R R refreshes the currently selected data connection or query. Unlike Refresh All, this only updates the specific data source associated with the selected cell or table, which is faster when you only need to update one connection.