an original Macintosh with a "MacChimney" attached to the top, a folding paper dunce-cap-like contraption intended to help convection-cool the computer's internals due to its lack of a cooling fan
https://cdn.masto.host/fduriansoftwarecom/media_attachments/files/114/577/629/134/565/182/original/f1d435f0e123d72d.jpeg