Macintosh SE/30 Specs

The Macintosh SE/30 was the last of the compact Macs.  It was designed, manufactured and sold by Apple between 1989 and 1991. The fastest of the Compact Macintosh series, it also offered the most expansion options.  It’s production coincided with that of the Macintosh Classic, Macintosh IIcx and Macintosh IIci.

The SE/30 comprises a re-developed motherboard from a Macintosh IIx in the  case of a Macintosh SE with a black-and-white 9 inch monitor and a single PDS slot (rather than the NuBus slots of the IIx or Mac IIcx) which supported third-party accelerators, network cards, or a display adapter.

Note: The single 32-bit PDS expansion slot, called the 030 Processor Direct Slot was basically NuBus-compatible but had a different form factor so 96-pin NuBus cards didn’t fit.

One thing to note about the SE/30 was it’s longevity, with many users retaining this Mac for a decade before finally retiring it.


The Apple Macintosh SE/30 features a 16 MHz 32 bit Motorola 68030 processor and is the fastest of all of the monochrome compact Macs- albeit on a 24 bit bus. It’s 256k Boot ROM permanently stored the instruction set necessary upon power on.

When the SE/30 was released, a motherboard upgrade for the Mac SE was made available, replacing the 68000 with a 68030.  However, without the addition of a 1.44MB floppy drive and hard drive, the upgraded SE was not able to run System 7. NB: The SE originally shipped with an 800k floppy and many lacked a Hard Drive.


Although officially only able to support 8 MB, the SE/30 could expand up to 128 MB of RAM (a ludicrous amount of RAM at the time).  It should be noted though that the Macintosh SE/30 ROM is “32-bit dirty.” in that it is only 24 bits wide, limiting the initial RAM capacity to 8 megabytes.  A “Hack” or “Fix” in the form of an extension called Mode32 was developed by third parties that circumvented the 24 bit issue, allowing for 32 bit to be addressed simultaneously and 128MB RAM to be addressed. An alternative involved performing surgery on the motherboard and swapping out the ROM for one from a Macintosh IIsi or Macintosh IIfx  The Macintosh SE/30 utilized 30 pin SIMMs with 120ns response time.


The SE/30 came equipped with a 40 or 80 MB SCSI hard drive. The 50 pin drive could be upgraded (albeit with prior technical knowledge). 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).  Both Drives were front facing and a Bezel covered the slot that retained the Hard Drive.  A Hard Drive activity light was also visible next to the Bezel.

SE/30 motherboard

Video & Graphics:

The SE/30 incorporated 64K of Vram and displayed a monochrome (black and white) picture at a resolution of 512×342.


The PDS slot would accept an upgrade card that added further functionaliity.  The Asante MacCon 30si added networkability and cards were produced that provided both a network port and FPU (a 68882 FPU ) as the 68030 was devoid of FPU (Math Co Processor). Sonnet also produced the Allegro, with offered a 33mHz 68030 processor upgrade to fit the PDS slot.

Supported Operating Systems:

The SE/30 originally shipped with System 6.0.3 installed.  It was supplied with a full set of installation disks as well as additional Apple software.  It could be upgraded to System 7.5.5.

Ports & Connectivity:

The System was supplied with 2 x ADB ports, DB-25 SCSI port, 2 x Serial (8 pin mini din) ports and mono sound out.

Introduction Date: January 19, 1989 Discontinued Date: October 21, 1991
Processor Speed: 16 MHz Processor Type: 68030
Processor Upgrade: Third-Party FPU: 68882
System Bus Speed: 16 MHz Cache Bus Speed: N/A
Details: N/A
ROM/Firmware Type: Macintosh ROM ROM/Firmware Size: 256k
L1 Cache: 0.5k L2 Cache: N/A
Details: N/A
RAM Type: 30-pin SIMM Min. RAM Speed: 120 ns
Details: N/A
Standard RAM: 1 MB, 4 MB Maximum RAM: 128 MB*
Motherboard RAM: None RAM Slots: 8
Details: N/A
Video Card: Integrated VRAM Type: Built-in
Details: N/A
Standard VRAM: 64k Maximum VRAM: 64k
Details: N/A
Built-in Display: 9″ Monochrome Native Resolution: 512×342
Details: N/A
Standard Hard Drive: 40 MB, 80 MB* Int. HD Interface: SCSI*
Details: The M5392 configuration shipped without a hard drive.
Standard Optical: None Standard Disk: 1.44 MB (Auto)
Details: N/A
Standard Modem: None Standard Ethernet: None
Details: N/A
Expansion Slots: SE PDS Expansion Bays: None*
Case Type: All-in-One Form Factor: Macintosh SE
Details: N/A
Apple Order No: M5392* Apple Subfamily: Macintosh SE/30
Details: *M5392 refers to the configuration with 1 MB of RAM and a 1.44 MB floppy disk drive. M5390 refers to the configuration with 1 MB of RAM, a 1.44 MB floppy drive, and a 40 MB hard drive. M5361 refers to the configuration with 4 MB of RAM, a 1.44 MB floppt drive, and an 80 MB hard drive.
Apple Model No: M5119 Gestalt ID: 9
Details: N/A
Battery Type: 3.6V Lithium Battery Life: N/A
Details: N/A
Original Mac OS: 6.0.3 Supported Mac OS: 6.0.3-7.5.1, 7.5.3-7.5.5
Details: Earlier and later versions of the Macintosh System/Finder and Mac OS are not supported.