| Introduced: | October 15, 1990 |
| MSRP: | $2999 |
| CPU: | Motorola 68030 |
| CPU speed: | 20 MHz |
| Shipped with system version: | 6.0.7 |
| RAM: | 1 MB, expandable to 17 MB |
| Discontinued: | March 15, 1993 |
The Macintosh IIsi was a compact 3-box desktop unit, effectively a cut-down Macintosh IIci in a smaller case, made cheaper by the redesign of the motherboard and the deletion of all but one of the expansion card slots. It was introduced as a low-cost alternative to the professional desktop models for home use, but offered more features and performance than the LC series. It had colour and could drive a number of different external monitors, with a maximum screen resolution of 640 x 480 in 8-bit colour.
It shipped with either a 40 or 80MB internal hard disk, and a 1.44 MB floppy disk drive. The MC68882 FPU was an optional extra, mounted on a special plug-in card. Ports included SCSI, ADB and a microphone/sound input socket.