To do Alt + J + P + I on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by J, P, I.
Command: Color
This is how to do Alt + J + P + I 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 + J + P + I opens the Color gallery in PowerPoint. This allows you to adjust color saturation, color tone, and apply color effects like grayscale, sepia, or recolor to your pictures.