macOS Sierra

For the first time since Apple released OS X 10.8 Mountain Lion in July 2012, Apple has dropped support for a number of older Macs that had supported OS X 10.8 through 10.11 El Capitan. No MacBook and iMac models prior to Late 2009 and no MacBook Air, MacBook Pro, Mac mini, and Mac Pro […]

The Unofficial PowerPro Homepage

This is the Unofficial PowerPro 601 Homepage. The PowerPro is an upgrade card that was manufactured by DayStar Digital and sold both under the Apple and DayStar brand names. It enables some members of the Quadra series of Macintosh computers with a Motorola 68040 CPU to be upgraded to a PowerPC 601 processor.

The Unofficial Turbo 601 Site

Supporting the exchange of information about the DayStar Turbo 601 PowerPC upgrade card manufactured by DayStar Digital. This page has not been updated since January 1999 and is published here as a useful historical resource.

Memory Upgrades: Quadra, LC, and Performa 630

Whether marked Quadra 630, LC 630, or Performa 63x, this model has 4 MB of RAM soldered to the motherboard and a single 72-pin SIMM socket for memory expansion up to 36 MB. (The DOS Compatible version and some 630s have a different motherboard with two SIMM slots and are covered on a separate page.)

The 68000 Dash 30fx, an Accelerated Mac IIfx

Most early Mac clones were built around 8-16 MHz 68000 CPUs or 16-40 MHz 68030 chips, but the 68000 Dash 30fx ran its 68030 at a blazing 50 MHz – 25% faster than the “wicked fast” Mac IIfx, which was the fastest computer on the market when it went on sale in March 1990.

Atari ST, Magic Sac, Spectre 128, and Spectre GCR

You may not remember the Atari ST family, a series of computers based on the same 8 MHz Motorola 680×0 CPUs as the early Macs. They never really carved out a niche in the US, although they were moderately popular in Europe. The STs offered PC compatible floppy drives, a DOS-compatible filing system, and GEM, […]

Dynamac and Dynamac EL

Thanks to Richard Savary for sending information about the Dynamac. Mentioned in Byte (May 1988), the jet black Dynamac EL weighs 18 pounds, uses an 8 MHz 68000 CPU, has an 800K floppy, and shipped with 1 MB RAM (expandable to 2.5 MB or 4 MB). It was essentially a portable Mac Plus.

Colby Classmate Portable Computer

In addition to building the first commercial portable Mac, the WalkMac, Chuck Colby also developed the first Mac tablet, which he called the Colby Classmate™ Portable Computer. It was introduced at the August 1991 Macworld Expo in Boston.

12″ MacBook (Early 2016)

Just over a year ago, Apple introduced a whole new model under the MacBook name – barely a half-inch thick and just a touch over two pounds. The Early 2016 model takes the next step forward with Intel Core m3, m5, and m7 processors and Intel HD Graphics 515.

iPhone SE

It’s been rumored that Apple was working on a new low-end model to replace the 4″ iPhone 5S, and that new model is called the iPhone SE. It looks like an iPhone 5S, but it has the same A9 CPU as the iPhone 6S and 6S Plus which gives it double the power of the 5S. It’s […]

16 MHz MicroMac Performer for Mac SE

Luca Fornari reports: About a year ago, a friend of mine gave me a Mac SE (you know the type: 68000 8 MHz, 2.5 MB RAM). A real snail, almost useless, but it was so cute I decided to keep it and put in 4 MB so I could run some software on it – mostly […]

Memory Upgrades: Mac LC 580, Performa 580

The Mac LC/Performa 580 shipped with 4 MB soldered on the motherboard and two 72-pin SIMM sockets for memory expansion – twice as many as the LC 550 and 575 – for up to 52 MB total system memory, the most possible in any 500-series Mac. Like other 500-series Macs, it has a slide-out motherboard.

Memory Upgrades: Mac TV

The Mac TV is pretty much a black LC 550 with a built-in TV tuner and a remote control for the TV portion of the computer. It has 4 MB soldered on the motherboard and comes from the factory with a 1 MB 72-pin SIMM in its only memory socket. Mac TV only had one […]

Memory Upgrades: Mac IIvx, IIvi; Performa 600

The Mac IIvx, Mac IIvi, and Performa 600 were odd ducks, running a 16 MHz motherboard when most of Apple’s other machines were already faster than that. Since the IIvi had a 16 MHz 68030 CPU, that wasn’t a bottleneck, but the IIvx and Performa 600 had 32 MHz CPU, which were hobbled by the […]