To do Alt + H + V + H on Mac in PowerPoint, download and install Accelerator Keys, then press Option, followed by H, V, then H.
Command: Use Destination Theme
This is how to do Alt + H + V + H 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 + V + H pastes content while applying the destination presentation’s theme formatting. This means the pasted content will adopt the fonts, colors, and styles of your current presentation rather than keeping its original formatting. This is ideal when copying slides or content between presentations with different themes.