To do Alt + H O U on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, O, and U.
Command: Hide & Unhide Menu
This is how to do Alt + H O U 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 O U opens the Hide & Unhide submenu with options to Hide Rows (R), Hide Columns (C), Hide Sheet (S), Unhide Rows (O), Unhide Columns (L), and Unhide Sheet (H). This is useful for temporarily hiding sensitive data or decluttering your view.