iMac G5 20-inch Late 2005 Datasheet

Source: apple.com – iMac with iSight

When it comes to personal computing, Apple has always been synonymous with innovation and design excellence. In 2005, the tech giant unveiled the iconic iMac G5 20-inch Late 2005, a machine that not only captured the hearts of Apple enthusiasts but also left an indelible mark on the world of technology.

The iMac G5 20-inch Late 2005 was a trailblazer in its time, boasting a range of revolutionary features that set it apart from its counterparts. One standout feature was its built-in iSight video camera, which facilitated seamless video conferencing—an innovation ahead of its time. Additionally, the debut of Apple’s Front Row media experience transformed the way users interacted with their content, offering a simple and intuitive interface for music playback, photo viewing, and movie watching.

Apple’s commitment to sleek design and top-notch performance was evident in the iMac G5 20-inch Late 2005. With a refined and thinner design compared to its predecessors, this machine exuded elegance while packing a punch in terms of performance. Powered by a 2.1 GHz PowerPC G5 processor and equipped with 512 MB of RAM, a spacious 250 GB hard drive, and ATI Radeon X600 graphics, it delivered a seamless and immersive computing experience.

iMac with iSight Webcam
Source: apple.com – iMac with iSight Webcam

The iMac G5 20-inch Late 2005 introduced users to innovative applications that further enhanced their computing experience. The inclusion of Photo Booth—a fun and interactive application for taking snapshots and adding entertaining visual effects—showcased Apple’s commitment to creativity and user engagement. Additionally, the integration of iChat AV software enabled effortless video conferencing right out of the box, fostering connectivity and collaboration.

Despite being discontinued in 2006, the iMac G5 20-inch Late 2005 continues to hold a special place in the hearts of Apple aficionados and technology enthusiasts. Its timeless design, groundbreaking features, and enduring performance have cemented its status as a classic in the annals of personal computing history. Even after 18 years, its legacy lives on, serving as a testament to Apple’s enduring commitment to innovation and excellence.

iMac with iSight
Source: apple.com – iMac with iSight

iMac G5 20-inch Late 2005 Details

IntroducedOctober 12, 2005 – 18 years ago
DiscontinuedJanuary 10, 2006 – 18 years ago
Time on the Market90 days (2 months)
Model IdentifierPowerMac12,1
Model NumberA1145
Order NumberMA064LL/A
Original Price$1,699
Weight22 Ibs.
9.979 KG
Dimensions18.6” H x 19.4” W x 7.4” D
47.24 cm H x 49.27 cm W x 18.79 cm D

iMac G5 Tech Specs


ProcessorPowerPC 970fx G5
Processor Speed2.1 GHz
Number of Cores1
System Bus700 MHz
Cache64 / 32 KB L1
512 KB backside L2

Storage & Media

Storage250 GB
500 GB
Media1 – 4x DVD-R/CD-RW “SuperDrive” slot-loading


Built-in Memory512 MB
Maximum Memory2.5 GB
Memory Slots1 – PC2-4200 240-pin DDR2 SDRAM 533 MHz
Interleaving SupportNo


Built-in Display20″ TFT LCD Display
Brightness280 cd/m²
Resolutions640 x 480
800 x 500
800 x 600
840 x 524
1024 x 640
1024 x 768
1280 x 800
1344 x 840
1680 x 1050


Graphics CardATI Radeon X600 XT
Graphics Memory128 MB DDR
Display Connection1 – Mini-VGA (Composite and S-video with adapter)
Display ModesVideo mirroring only
External ResolutionN/A


Expansion SlotsNone
Optical Drive InterfaceUltra ATA/133
Hard Drive Interface1.5 Gbps Serial ATA (SATA)


Ethernet10/100/1000BASE-T (RJ-45)
ModemApple USB Modem MA034Z/A (Optional)
Wi-FiAirPort Extreme Card 802.11b/g
BluetoothBluetooth 2.0 + EDR
USB3 – 480 Mbps (USB 2.0)
FireWire2 – 400 Mbps
Infrared1 – For Apple Remote only
Audio In1 – 3.5-mm analog/optical input jack
1 – Built-in microphone
Audio Out1 – 3.5-mm analog/optical combo jack
2 – Built-in speakers
Display1 – Mini-VGA (Composite and S-video with adapter)

Keyboard and Mouse

PeripheralsApple Keyboard
Apple Mighty Mouse
Apple Remote


Original OSMac OS X 10.4.2
Maximum OSMac OS X 10.5.8
FirmwareMac OS ROM
Bundled SoftwareMac OS X 10.4
iLife ’05 (includes iTunes, iPhoto, iMovie HD, iDVD, GarageBand)
Photo Booth
Front Row
DVD Player
Address Book
iWork (30-day trial)
Classic environment
Quicken 2006 for Mac
2006 World Book
Nanosaur 2
Marble Blast Gold
Microsoft Office 2004 for Mac Test Drive
Zinio Reader
XCode Developer Tools
Apple Hardware Test


Backup Battery3 V CR2032 Lithium
Maximum Continuous Power180 W
Line Voltage100-240 V AC

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Further Reading and References

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.