To do Alt + A H on Mac in Excel, download and install Accelerator Keys, then press Option, followed by A, H.
Command: Hide Detail
This is how to do Alt + A 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 + A H collapses a group to hide its detail rows or columns. When working with outlined data, this command hides the underlying detail and shows only the summary row or column, making it easier to view high-level information.