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Apple Macintosh II (Original) Specs

All Macintosh Models | All 1987 Models | Dynamically Compare This Mac to Others

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Apple Macintosh IIThe Apple Macintosh II features a 16 MHz 68020 processor, a 68881 FPU, 1 MB or 4 MB of RAM, a 40 MB or an 80 MB hard drive, and the option of an Apple Macintosh II video card in a large, easy-to-open desktop case.

The Macintosh II was nicknamed the "Open Mac" because of its 6 NuBus slots which made expansion and customization easy. The Macintosh II also was the first color-capable Macintosh and set a new standard for color in the computer industry by supporting true color (16.7 million colors) courtesy of the new Color QuickDraw language in ROM.

To purchase or upgrade a vintage Mac -- and newer Macs -- see site sponsor OHS.

  • Tech Specs
  • Ports

Click on the category for related details. The most commonly needed info is "open" by default, but all info is important.

March 2, 1987 January 15, 1990
Details: The "Introduction Date" refers to the date a model was introduced via press release. The "Discontinued Date" refers to the date a model either was replaced by a subsequent system or production otherwise ended.

Also see: All Macs introduced in 1987.
16 MHz 68020
Details: This model has a 32-bit processor and a 32-bit data path.
Third-Party* 68881
Details: *A variety of third-party processor upgrades and accelerators were available.
16 MHz N/A
Details: N/A
Macintosh ROM 256k*
Details: *The Macintosh II ROM is "32-bit dirty."
0.25k N/A
Details: N/A
30-pin SIMM* 120 ns
Details: *PAL SIMMs required for 4 MB and larger capacities.
1 MB, 4 MB 128 MB*
Details: *The ROM Is "32-bit dirty" and by default, the Macintosh II with its original ROM only supports 8 MB of RAM (1 MB SIMMs in each of eight slots). With the FDHD upgrade kit, the system is capable of supporting 68 MB of RAM (1 MB SIMMs in bank A and 16 MB SIMMs in bank B). Finally, with 32-bit addressing and the MODE32 system extension this model is capable of supporting 128 MB of RAM (16 MB SIMMs in all eight slots).

Also see: Actual Max RAM of All G3 & Later Macs.
None 8*
Details: *RAM SIMMs must be installed in groups of four.
Video Card* Video Card*
Details: *The standard video card options for the Macintosh II had either 256k or 512k of VRAM and supported multiple resolutions.
256k, 512k* 256k, 512k*
Details: *The standard video card options for the Macintosh II had 256k or 512k of VRAM, but numerous third-party video cards also were available.
Up to 6 Displays* 512x384, 640x480*
Details: *The Macintosh II can support multiple displays -- originally at great cost -- using multiple video cards in NuBus expansion slots. The Macintosh II also can support multiple resolutions, 512x384 and 640x480 are common. Portrait (vertical orientation) displays also were popular.
Dual/Mirroring* Variable*
Details: *The Macintosh II can support multiple displays with multiple video cards.
40 MB, 80 MB* SCSI
Details: *By default, the Macintosh II was offered with either a 40 MB or an 80 MB 5.25" internal SCSI hard drive.
None 800k x2 (Auto)*
Details: *Second floppy drive optional. The Macintosh II FDHD upgrade provided a 1.44 MB disk drive as well as Macintosh IIx ROMs for higher memory capacity.
None None
Details: N/A
6 NuBus None*
Details: *There are no free expansion bays with dual disk drives and one 5.25" hard drive installed. Third-party products were available to install additional and other storage options.
Desktop Macintosh II
Details: N/A
M5333* Macintosh II
Details: *M5333 refers to a configuration with 1 MB of RAM and a single 800k floppy disk drive. Configured with 1 MB of RAM, an 800k floppy drive and a 40 MB hard drive is order number M5430, and configured with 4 MB of RAM, an 800k floppy drive, and a 40 MB hard drive is order number M5410.
M5000 6
Details: N/A

Also see: All Macs with the M5000 Model Number and 6 Gestalt ID.

For more about identifiers and how to locate them on modern Macs, please refer to's Mac Identification section.
3.6V Lithium x2* N/A
Details: *The Macintosh II has two 3.6V Lithium batteries soldered to the motherboard.
2.0 2.0-7.5.1, 7.5.3-7.5.5
Details: Earlier and later versions of the Macintosh System/Finder and Mac OS are not supported.

For systems capable of running older versions of the Mac OS -- as well as modern ones -- please see site sponsor OHS. OHS specializes in heavily upgraded Macs capable of running both Mac OS X and Mac OS 9 applications.
5.5 x 18.7 x 14.4 24.0 lbs (10.9 kg)
Details: In inches - height by width by depth, (14 cm, 47.5 cm, 36.6 cm).
US$5500 N/A*
Details: *As a collector's item, this model may still retain value.

Photo Credit: MacUser Magazine (Radius Advertisement).

Click on a category for additional details. The most commonly needed info is "open" by default, but all info is important. The icons correspond with the icons for each port on the computer.

1* None
Details: *Video port provided by required video card. No onboard video port.
2 1 (DB-25)
Details: N/A
2 None
Details: Serial ports are marked by printer and modem icons.
None None
Details: N/A
None None
Details: N/A
None None
Details: N/A
1 (8-Bit Mono) None
Details: N/A
1 None
Details: N/A
1 N/A
Details: 90V-270V AC, 48-62 Hz Frequency, 230 Max Watts.

Icon Credit: Apple Computer, Inc.

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