To do Alt + W H on Mac in Excel, download and install Accelerator Keys, then press Option, followed by W, H.
Command: Hide
This is how to do Alt + W 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 + W H hide Window hides the current workbook window without closing it. The workbook remains open and can be shown again using Unhide Window.