To do Alt + H + X on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, then X.
Command: Cut
This is how to do Alt + H + X 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 + X cuts the currently selected content (text, shapes, images, or slides) and places it on the clipboard. The content is removed from its current location and can be pasted elsewhere. This is equivalent to pressing Cmd+X but accessed through the ribbon shortcut system.