Macintosh SE/30

The Macintosh SE/30 is a personal computer designed, manufactured and sold by Apple Computer, Inc. from January 1989 to October 1991. It is the fastest of the original black-and-white compact Macintosh series.

Macintosh SE/30
A Macintosh SE/30
Also known as"Green Jade"[1]
ManufacturerApple Computer, Inc.
Product familyCompact Macintosh
Release dateJanuary 19, 1989; 31 years ago (1989-01-19)
Introductory priceUS$4,369 (equivalent to $9,011 in 2019)
DiscontinuedOctober 21, 1991 (1991-10-21)
Operating systemSystem 6.0.3System 7.5.5
With a 32-bit clean ROM upgrade, Mac OS 7.6 - Mac OS 8.1
CPUMotorola 68030 @ 16 MHz
Memory1 MB RAM (120 ns 30-pin SIMM), expandable to 128 MB
Display9 inches (23 cm) monochrome, 512 × 342
DimensionsHeight: 13.6 inches (35 cm)
Width: 9.6 inches (24 cm)
Depth: 10.9 inches (28 cm)
Mass19.5 pounds (8.8 kg)
PredecessorMacintosh SE
SuccessorMacintosh Classic II
Related articlesMacintosh IIx

The SE/30 has a black-and-white monitor and a single Processor Direct Slot (rather than the NuBus slots of the IIx, with which the SE/30 shares a common architecture) which supported third-party accelerators, network cards, or a display adapter. Although officially only able to support 32 MB, the SE/30 could expand up to 128 MB of RAM (a significant amount of RAM at the time), and included a 40 or 80 MB hard drive. It was also the first compact Mac to include a 1.44 MB high density floppy disk drive as standard (late versions of the SE had one, but earlier versions did not). The power of the SE/30 was demonstrated by its use to produce the This Week newspaper, the first colour tabloid newspaper in the UK to use new, digital pre-press technology on a personal, desktop computer. In keeping with Apple's practice, from the Apple II+ until the Power Macintosh G3 was announced, a logic board upgrade was available to convert a regular SE to an SE/30. The SE would then have exactly the same specs as an SE/30, with the difference only in the floppy drive if the SE had an 800 KB drive. The set included a new front bezel to replace the original SE bezel with that of an SE/30.

In the naming scheme used at that time, Apple indicated the presence of a 68030 processor by adding the letter "x" to a model's name. When the Macintosh SE was upgraded with the 68030 processor, this posed an awkward problem; Apple was not willing to name their new computer the "Macintosh SEx". Thus, "SE/30" was the name chosen.[citation needed] Internally, code names such as Green Jade, Fafnir, and Roadrunner were used.[2]

This machine was followed in 1991 by the Macintosh Classic II, which, despite the same processor and clock speed, was only 60% as fast as the SE/30 due to its 16-bit data path,[3] supported no more than 10 MB of memory, lacked an internal expansion slot, and made the Motorola 68882 FPU an optional upgrade.


Mainboard of the SE/30

Although it uses 32-bit instructions, the SE/30 ROM, like the IIx ROM, includes some code using 24-bit addressing, rendering the ROM "32-bit dirty". This limited the actual amount of RAM that can be accessed to 8 MB under System 6.0.8.[1] A system extension called MODE32 enables access to installed extra memory under System 6.0.8. Under System 7.0 up to System 7.5.5 the SE/30 can use up to 128 MB of RAM. Alternatively, replacing the ROM SIMM with one from a Mac IIsi or Mac IIfx makes the SE/30 "32-bit-clean" and thereby enables use of up to 128 MB RAM and System 7.5 through OS 7.6.1.

A standard SE/30 can run up to System 7.5.5,[4] since Mac OS 7.6 requires a 32-bit-clean ROM.[5]

Additionally, the SE/30 can run A/UX, Apple's older version of a Unix that was able to run Macintosh programs.[6]

Though there was no official upgrade path for the SE/30, several third-party processor upgrades were available. A 68040 upgrade made it possible to run Mac OS 8.1, which extended the SE/30's productive life for many more years. The Micron Technology Xceed Gray-Scale 30 video card fit into the SE/30's Processor Direct Slot, enabling it to display greyscale video on its internal display, the only non-color compact Mac able to do so.[7][8]


  • Macintosh SE/30:[9] Available in multiple configurations.
    • US$4,369 (1MB RAM, No hard disk)
    • US$4,869 (1MB RAM, 40MB Hard disk)
    • US$6,569 (4MB RAM, 80MB Hard disk)[10]


Bruce F. Webster wrote in Macworld in March 1989 that the SE/30 did not "break new ground. It does, however, establish Apple's commitment to the classic Mac product line, and it provides users with an Apple-supported alternative to either a small, slow Mac or a large, powerful one. More important, it fills a gap in the Macintosh family ... a new level of power and portability for the Macintosh community".[11]

In a January 2009 Macworld feature commemorating the 25th anniversary of the Macintosh, three industry commentators – Adam C. Engst of TidBITS, John Gruber of Daring Fireball, and John Siracusa of Ars Technica – chose the SE/30 as their favorite Mac model of all time. "Like any great Mac," wrote Gruber, "the SE/30 wasn't just a terrific system just when it debuted; it remained eminently usable for years to come. When I think of the original Mac era, the machine in my mind is the SE/30."

The SE/30 remains popular with hobbyists, and has been described as “the best computer Apple will ever make,”[12] with used models selling for a significant premium relative to other machines of the era. Contemporary PDS upgrades allowed an SE/30’s internal monitor to be upgraded to support 256 shades of gray[13] (the only original-design Macintosh to support such an upgrade) or a 68040 processor, and the SE/30’s standard RAM limit of 128MB greatly exceeded even that of much later models such as the Color Classic and Macintosh LC II. In 2018, add-ons and software became available to add WiFi[12] and even streaming Spotify support[14] to the SE/30.

Popular cultureEdit

In the NBC TV series Seinfeld, Jerry has an SE/30 sitting on his desk during the first seasons. This would be the first of many Macs to occupy the desk, including a PowerBook Duo and a Twentieth Anniversary Macintosh.

In the FX series It's Always Sunny In Philadelphia, the Waitress is seen with a Macintosh SE/30 on her bedroom desk in the episode "The Gang Gives Back".

In the film Watchmen, Ozymandias has an all-black TEMPEST-shielded SE/30 on his desk.[15]

Timeline of compact Macintosh models

Power MacintoshMacintosh LC 520PowerBookMacintosh LCMacintosh PortableMacintosh II seriesApple IIeMacintosh Classic IIMacintosh Color ClassicMacintosh SE/30Macintosh ClassicMacintosh PlusMacintosh PlusMacintosh XLMacintosh SEMacintosh 512KeApple LisaMacintosh 128KMacintosh 512K


  1. ^ a b Pogue, David; Schorr, Joseph (1999). MacWorld Mac Secrets, 5th Edition. IDG Books. pp. 461-462. ISBN 0-7645-4040-8.
  2. ^ Linzmayer, Owen W. (2004). Apple Confidential 2.0. No Starch Press. p. 48. ISBN 1-59327-010-0.
  3. ^ "Mac Classic II, a Compromised Mac". Low End Mac. March 12, 2014.
  4. ^ "25 Years of the Mac SE/30". Low End Mac. January 19, 2014.
  5. ^ "Lowendmac". Minimum requirements for Mac OS 7.6 included a 68030 CPU, "32-bit clean" ROMs, 8 MB of RAM (12-16 MB recommended), and 70 MB of hard drive space. It no longer supported 24-bit addressing or classic Mac networking (it used OpenTransport exclusively).
  6. ^ "A/UX FAQ". A/UX 3.0 works on the Mac II (with PMMU or 68030 upgrade with FDHD ROM's installed), IIx, IIcx, IIci, IIfx, SE/30, IIsi (with 68882 chip) and the Quadra 700/900/950 computers.
  7. ^ "SE/30 GrayScale ScreenShots". Archived from the original on June 12, 2002. Retrieved July 20, 2020.
  8. ^ "Micron Xceed for Mac SE/30". Low End Mac. September 2, 1999.
  9. ^ "Macintosh SE/30: Technical Specifications". Apple.
  10. ^ "InfoWorld March 27, 1989".
  11. ^ Webster, Bruce F. (March 1989). "The Mac SE Turns 030". Macworld. pp. 112–117. Retrieved August 20, 2016.
  12. ^ a b By (September 26, 2018). "Apple's Best Computer Gets WiFi". Hackaday. Retrieved August 10, 2019.
  13. ^ "Micron Xceed for Mac SE/30". Low End Mac. September 2, 1999. Retrieved August 11, 2019.
  14. ^ Coward, Cameron (December 26, 2018). "A Macintosh SE/30 Spotify Music Player". Medium. Retrieved August 10, 2019.
  15. ^ Diaz, Jesus (March 6, 2009). "Watchmen's Old School Macintosh SE/30". Gizmodo. Archived from the original on July 2, 2012. Retrieved September 2, 2020.