This is DefaultPoof.

Download and unzip.

Change to Mac-specific Poof.

Open "Defaults" in the folder of RocketDock (Windows (C :)-> Program Files (x86)-> RocketDock).

Open "DefaultPoof" in it.

Poof.png is included.

Create a folder "DF" and put it in it.

Insert Mac specification Poof.png.

RocketDock must be closed before it can be changed.

When you restart RocketDock, the changes should be correct.