To do Alt + H O U R on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, O, U, and R.
Command: Hide Rows
This is how to do Alt + H O U 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 + H O U R hides the selected rows from view. The data remains in the spreadsheet but is not visible. Hidden rows are indicated by missing row numbers and a slightly thicker line between adjacent rows.