To do Alt + 8 on Mac in Excel, download and install Accelerator Keys, then press Option, followed by 8.
Command: Document Actions
This is how to do Alt + 8 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 + 8 opens the Document Actions dropdown menu. This provides quick access to document-related actions including renaming your workbook, viewing version history, and other file management options. Note: On Mac Excel, this shortcut behaves the same as Alt + 9.