To do Alt + H + G on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, then G.
Command: Arrange Menu
This is how to do Alt + H + G on Mac in PowerPoint with Accelerator Keys, the native ribbon and alt key shortcut solution for Mac users who get more done with PowerPoint.
Alt + H + G opens the Arrange menu, providing options for ordering objects (bring to front, send to back), grouping/ungrouping, aligning objects, rotating, and accessing the Selection Pane.