20th Anniversary Macintosh 20th Anniversary Macintosh

Twentieth Anniversary Macintosh Explained

In the ever-evolving landscape of technology, Apple has consistently pushed the boundaries of innovation, and one remarkable testament to this commitment is the Twentieth Anniversary Macintosh. Launched in 1997, this iconic computer marked a celebratory milestone for Apple, encapsulating 20 years of groundbreaking technology.

March 20, 1997, saw the debut of the 20th Anniversary Macintosh, a true work of art in the world of computing. Priced at a hefty $7,499, it stood as a testament to Apple’s dedication to delivering cutting-edge technology with a touch of luxury. Beyond its price tag, this Macintosh was a visual delight, boasting a sleek and futuristic design that set it apart from its contemporaries.

Beneath its elegant exterior, the Twentieth Anniversary Mac was a powerhouse of technology. Featuring a 250 MHz PowerPC 603e processor, a 12.1-inch color LCD display, 32 MB of RAM, a 2 GB hard drive, 4x CD-ROM drive, and 2 MB ATI Rage IIc graphics, it delivered lightning-fast speeds and top-of-the-line performance. The unique combination of components, including the Power Mac 6500’s motherboard, made it a standout in the computing world.

The 20th Anniversary Mac was not just a computer; it was a futuristic concept brought to life. With features borrowed from the PowerBook 3400 and the Power Macintosh 6500, it presented a unique blend of technology. The external power supply, cleverly integrated into a subwoofer manufactured by Bose, contributed to its compact footprint. The small keyboard, devoid of a numeric keypad but featuring a touchpad and leather palm rests, added a touch of sophistication.

Despite its initial marketing as an elite system with a concierge service for personalized delivery and setup, sales of the Twentieth Anniversary Macintosh were slow. Apple, acknowledging the need to adapt, eventually lowered the price of its premium product. The discontinuation in March 1998 marked the end of its brief time on the market. However, this unique Macintosh has not faded into obscurity; it has become a sought-after collector’s item, cherished by dedicated Macintosh enthusiasts.

Today, as the Twentieth Anniversary Macintosh turns 26, it stands as a timeless symbol of Apple’s innovative spirit. Despite its challenges, it remains a piece of technological history, remembered for its avant-garde design and cutting-edge features. The legacy of this iconic computer lives on in the hearts of collectors who appreciate its uniqueness and the mark it left on the computing world. The Twentieth Anniversary Macintosh may have had a short-lived presence, but its impact is everlasting.

Twentieth Anniversary Macintosh
Source: lowendmac.com – Twentieth Anniversary Macintosh

Twentieth Anniversary Mac Details

IntroducedMarch 20, 1997
DiscontinuedMarch 14, 1998
Model Identifier512
Model NumberUnknown
Order NumberM3459LL/A
Original Price$7,499
Weight14.9 Ibs.
6.758 KG
Dimensions17.25” H x 16.5” W x 10” D
43.81 cm H x 41.91 cm W x 25.4 cm D

20th Anniversary Mac Tech Specs


ProcessorPowerPC 603e
Processor Speed250 MHz
Number of Cores1
System Bus50 MHz
Cache32 KB L1
256 KB L2
CoprocessorBuilt-in FPU

Storage & Media

Storage2 GB
Media1 – 1.44 MB Floppy
1 – 4x CD-ROM


Built-in Memory32 MB
Maximum Memory128 MB
Memory Slots2 – 168 pin DIMM
Minimum Speed60 ns
Interleaving SupportNo


Built-in Display12.1″ color active-matrix TFT Display


Graphics CardATI Rage IIc
Graphics Memory2 MB SGRAM
Display ConnectionNone


Expansion Slots1 – 7″ PCI
1 – Comm. II Slot
Hard Drive InterfaceIDE


Modem33.6k (External)
SCSI1 – DB-25
Floppy PortNone
Audio In1 – 3.5-mm analog input jack
1 – Built-in microphone
Audio Out2 – 3.5-mm analog output jack
2 – Built-in speaker


Original OSMac OS 7.6.1
Maximum OSMac OS 9.1
FirmwareMacintosh ROM


Backup Battery4.5 V Alkaline
Maximum Continuous Power140 W
Line Voltage90-130/180-264 V

Further Reading and References

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Last updated: November 23, 2023

Disclaimer: The data presented in this article is under continuous development and has been manually collected from various sources based on their availability. The author of this article may revise this dataset as additional research is conducted and reviewed. Please note that the information is provided “as is” and “as available” without express or implied warranties. The author cannot be held responsible for any omissions, inaccuracies, or errors in the published information. Any warranties relating to this information are hereby disclaimed.