Here's my solution to discerning who's Mac belongs to whom at a glance: vinyl graphics from Blik Graphics.

 

I chose the tree image because it is reminiscent of my main page website illustration, which prominently displays a tree with cute squirrel on it (conceptualized by myself & superbly executed by the creator of Strawberry Shortcake.) If only I could have a squirrel instead of the bird, then it'd be absolutely *perfect*. Otherwise, not to shabby, eh?