To do Alt + H O U H on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, O, U, and H.
Command: Unhide Sheet
This is how to do Alt + H O U H 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 H opens the Unhide dialog showing all hidden sheets in the workbook. Select a sheet from the list and click OK to make it visible again. This is essential for accessing data on sheets that were previously hidden.