To do Alt + H L H on Mac in Excel, download and install Accelerator Keys, then press Option, followed by H, L, H.
Command: Highlight Cells
This is how to do Alt + H L 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 L H opens the Highlight Cells Rules submenu with options to highlight cells based on value comparisons, text content, or dates.