Macintosh SE

“The workhorse in the platinum suit.”

Introduced: March 2, 1987
Discontinued: October 1990
Launch price: $2,900 (dual floppy) / $3,900 (with 20 MB hard disk)

Museum placard

The SE is the compact Mac grown up and gone to work. It introduced the 'platinum' grey that would define Apple hardware for a decade, added the first internal hard disk and the first expansion slot in a compact Mac, and gained a cooling fan so it could run all day, every day. Tens of thousands of offices ran on this machine. Many of them still would.

Vital statistics

Processor	Motorola 68000 @ 8 MHz
Memory	1 MB RAM, expandable to 4 MB
Display	9-inch built-in, 512 × 342, 1-bit black & white
Storage	Dual 800 KB floppies, or one floppy + 20 MB internal SCSI disk
Expansion	SE PDS slot (accelerators, video cards, network cards)
Ports	SCSI, 2 × ADB (a first), 2 × serial, floppy
Operating system	System 4.0 at launch; runs up to System 7.5.5
Notable first	First compact Mac with a fan, expansion slot, and internal hard disk

The story

SE stood for 'System Expansion,' and the name was the message. Apple's engineers had spent three years listening to businesses explain why they bought IBM instead, and the SE was the response: a compact Mac you could open up, upgrade, and leave running around the clock.

The case was subtly all-new — the first Macintosh styled in Frog Design's Snow White language, with the new platinum grey replacing beige. Inside, the changes were bigger. A Processor Direct Slot let third parties sell accelerator and video cards. A 20 MB hard disk could live inside the case for the first time. And after three years of Steve Jobs' no-fan doctrine (Jobs had left in 1985), the SE finally got a fan, ending the compact Mac's habit of gently roasting its own analog board.

The SE also debuted the Apple Desktop Bus, a simple daisy-chainable connector for keyboards and mice that Apple would use for the next twelve years — one of those quiet standards that outlived nearly everything around it.

Paired with the Mac II, which launched the same day and took the high end, the SE gave Apple a real product line for the first time: the II for power users, the SE for everyone with a desk and a job to do.

Why it matters

The SE was the Mac that conquered the office. It was the receptionist's machine, the writer's machine, the school lab's machine — durable enough that a remarkable number survive today, and expandable enough that hobbyists were still upgrading them decades later.

It also marks the moment the Mac stopped being an appliance and became a platform in the hardware sense. The PDS slot created a genuine ecosystem of accelerators and add-ons, and ADB standardized Apple's input devices until the iMac's USB revolution in 1998.

What it's like to use one

An SE feels like a Plus with its shoes tied. Same processor, same screen, but the fan means it hums instead of bakes, the internal hard disk means it boots on its own, and the whole machine gives the impression of being built for a decade of service — because it was.

The fan is the soundtrack: a steady electric whir with the hard disk's chatter underneath, the sound of a late-eighties office ambience. SE keyboards (ADB, sold separately, to some grumbling) have some of the best key feel Apple ever shipped, especially the tank-like Apple Extended Keyboard. Among collectors the SE is beloved as the practical compact — cheap, common, sturdy, and endlessly moddable through that expansion slot.