To do Alt + 6 on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by 6.
Command: Search
This is how to do Alt + 6 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 + 6 focuses the Search box in the Quick Access Toolbar area. This allows you to quickly search for commands, help topics, or content within your presentation without using the mouse. Simply start typing after pressing Alt + 6 to find what you need.