Apple High-Resolution Monochrome Display, Apple Macintosh Portrait Display, Apple Two Page Monochrome Monitor and Macintosh IIcx

The Macintosh IIcx is a personal computer designed, manufactured and sold by Apple Computer, Inc. from March 1989 to March 1991. Introduced six months after the Macintosh IIx, the IIcx resembles the IIx and provides the same performance, but is seven inches (18 cm) narrower, ten pounds (4.5 kg) lighter, and quieter due to a smaller internal fan. The relative compactness results in three NuBus slots being available, compared with six on the IIx.

The new case, Apple's first to be designed to operate in either a horizontal or vertical orientation, remained in use for its successors the Macintosh IIci and Quadra 700. The idea for vertical orientation, one of the first minitower cases, was suggested by Apple CEO John Sculley, who was running out of space on his desk, despite the fact that the new layout actually took more space once the monitor was taken into account. The model was designated IIcx for compact (echoing the earlier Apple IIc), and the x was Apple's designation for the Motorola 68030 processor.