To do Alt + H + C + C on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, C, then C.
Command: Copy
This is how to do Alt + H + C + C 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 + C + C copies the currently selected content (text, shapes, images, or slides) to the clipboard without removing it from its current location. The content can then be pasted elsewhere. This is equivalent to pressing Cmd+C but accessed through the ribbon shortcut system.