Apple iMac “PowerPC G5″ 2.1 GHz 20” iSight 2005 Specs

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iMac – MA064LL/A – PowerMac12,1 – A1145

About this iMac

In the models released in the 2004 and 2005 period, there were a number of modifications that set The Apple iMac brand apart. In this model the iSight Camera included for video conferencing was one of the major highlights also there was a significant reduction in the size (50% of an inch thinner) and the weight (15% lighter) of the computer. The Apple Mighty Mouse was also introduced on this device and a six-button Apple remote also came along with the package. FireWire “400” and USB ports were not left out in the production of the iMac G5 iSight computer. The device featured an enhanced 2.1 GHz PowerPC 970 fx (G5) processor. Another machine to look back on even though the world has made strides from this point.

2. 2.1 GHz PowerPC G5

512 MB

250 GBHard Drive

Plugged-in

Storage

The device was built with 250.0 GB Serial ATA (1.5Gb/s) hard drive storage with a disk speed of 7200 RPM.

Screen Size and Resolution

The iMac G5 (iSight) featured a 20 inch screen with TFT active matrix LCD display and a native resolution of 1680×1050.

Processor& Graphics Processing Unit (GPU)

The iMac had Mac OS X 10.4.2 (8E102) pre-installed on it. The processor that powered the computer was the 2.1 GHz PowerPC 970fx (G5) processor. Its graphics processor was the ATI Radeon X600 XT graphics with 128 MB of DDR SDRAM.

Memory & Architecture

The device was built with 512k on-chip level 2 cache with a frontside bus of700 MHz as well as 512 MB of 533MHz PC3200 DDR SDRAM for its RAM.

Size and weight

Although the iMac came with 512 MB of RAM it could be upgraded up to 2.5 GB of RAM.

The Operating System of the iMac can also be upgraded from its pre-installed Mac OS X 10.4.2 (8E102) up to MacOS X 10.5.8.

This iMac had the following dimensions and weight 47.2 cm, 49.3 cm, 18.9 cm and weight of22 lbs. (10 kg).

Inclusive Features

The iMac includes the following features and ports:

A Power Adapter (100V-240V AC, 180 W maximum)
Standard AirPort Extreme (802.11g).
Bluetooth 2.0+EDR
Two FireWire 400 ports
1 Mini-VGA port that supported Mirroring
Apple Remote
iSight Video Camera for video conferencing
Built-in Stereo Speakers

Introduced:October 12, 2005		Discontinued:January 10, 2006
Screen Size and Resolution		Memory
Screen Size	20 inches TFT	Level 1 Cache	32k/64k
Resolution	1680×1050	Level 2/Level 3 Cache	512k (on-chip)
Processor		RAM Type	PC2-4200 DDR2
Processors	1	Min. RAM Speed	533 MHz
Architecture	64-Bit	Standard RAM	512 MB
Speed	2.1 GHz	Maximum RAM	2.5 GB
Type	PowerPC 970fx (G5)	RAM Slots	1
Processor Upgrade	Soldered	Motherboard RAM	512 MB
FPU	Integrated	Graphics
System Bus Speed	700 MHz (3:1)	Video Card	Radeon X600 XT
Cache Bus Speed	2.1 GHz (Built-in)	VRAM Type	DDR SDRAM
ROM/Firmware	Open Firmware	Standard VRAM	128 MB
EFI Architecture	N/A	Maximum VRAM	128 MB
Storage		Inclusive Features and Ports
Standard Storage	250 GB HDD	Standard Optical Drive	8X DL “Super Drive”
Storage Speed	7200 RPM	Standard Ethernet	10/100/1000Base-T
Storage Dimensions	3.5” (26.10 mm)	Standard Modem	56k v.92
Storage Interface	Serial ATA (1.5Gb/s)	Standard Air Port	802.11b/g (Standard)
Battery		Standard Bluetooth	2.0+ EDR
Type	3.6V Lithium	USB Port 2.0	3
Battery Life	N/A	FireWire (400)	2
Description		Keyboard	Apple Keyboard
Case Type	All-in-One	Inclusive Input	Apple Mighty Mouse
Form Factor	iMac G5 iSight	S-Video Output	1
Apple Order No	MA064LL/A	Microphone	1 (Built-in)
Apple Subfamily	iSight	Headphone	1
Apple Model Number	A1145 (EMC 2082)	Sound Out	1
Model ID	PowerMac 12.1	Power Adapter	1

Identifier reference: MA064LL/A, A1145, EMC 2082. Use these together because one Apple identifier can sometimes cover multiple configurations.

Last reviewed by Techable: August 19, 2025Identifiers checked: order number, A-number, EMC, and model identifier when available.

Model summary

This iMac at a glance

Family: iMac
Order Number: MA064LL/A
Model Number: A1145
EMC: 2082
Year: 2082

Use the order number, A-number, EMC, and model identifier together when comparing, buying, or selling this device.

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Next steps

Use the spec table to confirm the exact device, then choose the right lookup, buy, or sell path.

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Common questions

Is MA064LL/A the same as A1145?

Not exactly. MA064LL/A usually points to a specific retail configuration, while A1145 identifies the broader Apple hardware family. Always check the EMC and model identifier too.

What iMac is model A1145?

A1145 is the Apple A-number shown for this iMac family. Use the order number, EMC, and model identifier on this page to narrow the exact configuration.

What does EMC 2082 mean?

The EMC number is another Apple hardware identifier. It helps separate closely related models that may share a similar name, year, or A-number.

Can the RAM or SSD be upgraded?

Check the spec table for the exact configuration. Many newer Apple Silicon Macs have memory and storage integrated into the board, so RAM and SSD upgrades are often not practical after purchase.

What macOS versions work with this model?

Use the model identifier, release year, and processor family from the spec table when checking macOS compatibility. Compatibility can change as Apple releases new macOS versions.

Is this iMac still worth buying used?

It can be, depending on price, battery health, memory, storage, and condition. Compare this exact order number and model identifier against similar Techable listings before buying.

How much is this iMac worth?

Value depends on RAM, storage, battery health, cosmetic condition, accessories, and market demand. Use the SellMac path on this page for a quote or use the identifiers here when comparing resale prices.

What should I search if this page is not the exact configuration?

Search the order number first when available, then compare the A-number, EMC, model identifier, year, chip, RAM, and storage. The same A-number can cover more than one configuration.

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