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Apple iMac G4/1.0 15-Inch "FP" (USB 2.0) Specs

Identifiers: iMac USB 2.0 - M9285LL/A - PowerMac6,1 - N/A - N/A

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Apple iMac G4 (Flat Panel)The Apple iMac G4/1.0 15-Inch (Flat Panel) features a 1.0 GHz PowerPC 7445 (G4) processor with the AltiVec "Velocity Engine" vector processing unit and a 256k on-chip level 2 cache, 256 MB of RAM (333 MHz PC2700 DDR SDRAM), an 80.0 GB Ultra ATA/100 hard drive (7200 RPM), a tray-loading 32X "Combo" drive, NVIDIA GeForce4 MX graphics with 32 MB of DDR SDRAM (AGP 4X support), and support for AirPort Extreme (802.11g) and Bluetooth with optional cards.

The internal components are housed in an attractive 10.6" half-sphere, ice white case with a chromed stainless steel neck that supports a 15" TFT Active Matrix LCD display. This model shipped with MacOS X 10.2 "Jaguar" (and cannot boot into MacOS 9), as well as an ice white Apple Pro Keyboard, Mouse, and Speakers. Unlike some earlier iMac models that are convection-cooled, the iMac "Flat Panel" series is cooled by a quiet internal fan.

Also see: What are the differences between the final "USB 2.0" iMac G4 "Flat Panel" models?

Buy This Mac -- and all other new & used Macs -- at site sponsor PowerMax.

Buy Used iMac G4s and much more at site sponsor MegaMacs.

Upgrade This Mac at site sponsor Other World Computing. Memory, drives & more.

Fix This Mac -- free diagnosis and affordable 24-hour repair at site sponsor Mission Repair.

Click on the underlined category text for related details. The most commonly needed info is "open" by default, but all info is important.

September 8, 2003 July 1, 2004
Details: The "Introduction Date" refers to the date a model was introduced via press release. Unusually, Apple discontinued the iMac "Flat Panel" models on July 1, 2004 and was unable to ship the replacement iMac G5 models until August 31, 2004.

Also see: All Macs introduced in 2003.
1.0 GHz PowerPC 7445 (G4)
Details: The PowerPC G4 includes the AltiVec "Velocity Engine" vector processor.
1 539 & N/A
Details: This model only is compatible with the 32-bit Geekbench 2 benchmark. These numbers reflect an average of user provided 32-bit and 64-bit results as submitted to the Geekbench website. Higher numbers are better.

You also might be interested in reviewing all 32-bit and 64-bit Geekbench 2 user submissions for Macs with the PowerMac6,1 Model Identifier, which may include multiple models.

To dynamically compare Geekbench results from different Macs side-by-side, see's Ultimate Mac Comparison.
Soldered Integrated
Details: The processor is mounted directly to the motherboard.
167 MHz 1.0 GHz (Built-in)
Details: N/A
Open Firmware 1 MB
Details: The Boot ROM is roughly 1 MB, other instructions are loaded into RAM.
64k 256k (on-chip)
Details: 256k on-chip level 2 cache runs at processor speed.
PC2700 DDR SDRAM 333 MHz
Details: This system uses 333 MHz PC2700 DDR SDRAM (2.5v) memory modules.

Also see: How do you upgrade the RAM in the iMac G4 models? How much RAM of what type do these systems support?
256 MB 2 GB*
Details: *Apple reports that this model can support 1 GB of RAM. However, "unofficially" it can support 2 GB of RAM.

In the US (and many other countries), site sponsor Other World Computing sells memory -- as well as other upgrades -- for this iMac.

In Australia, site sponsor RamCity sells memory and other upgrades for this iMac.

Also see: Actual Max RAM of All G3 & Later Macs.
None 2*
Details: *There is one factory installed memory module in a 184-pin DIMM slot and one 200-pin user-accessible SO-DIMM slot.
Details: Shipped with a "NVIDIA GeForce4 MX graphics processor with AGP 4X support".

Also see: What type of video processor is provided by the iMac G4? Is it upgradable?
32 MB 32 MB
Details: The video cannot be upgraded.
15.0" TFT 1024x768
Details: This model has a 15.0" TFT active matrix display with a native resolution of 1024x768 at "millions of colors". It also supports "640 by 480 pixels and 800 by 600 pixels". Apple reports a "typical" brightness of 200 cd/m, contrast ratio of 300:1, and viewing angle of 120 degrees horizontal and 90 degrees vertical.
Mirroring Only* 1024x768*
Details: Apple reports that this system has a "mini-VGA output port for video mirroring on [an] external display or projector (requires Apple VGA Display Adapter, sold separately)." and supports output resolutions of "640 by 480 pixels at 60 Hz, 800 by 600 pixels at 75 Hz, and 1024 by 768 pixels at 75 Hz".

However, the hardware is capable of using an external display in dual or "extended desktop mode", Apple just blocked the capability in firmware to protect sales of more expensive Macs. Unsupported third-party hacks are available.
80 GB (7200 RPM) Ultra ATA/100
Details: This model supports hard drives larger than 128 GB.

Also see: How do you replace or upgrade the hard drive in the iMac G4 models? Which models support "big drives" and which do not?

Site sponsor Other World Computing sells storage upgrades for this iMac.
32X "Combo Drive" None
Details: Apple reports that the tray-loading 32X DVD-ROM/CD-RW Combo drive "reads DVDs at 8x speed, writes CD-R discs at 32x speed, writes CD-RW discs at 10x speed, [and] reads CDs at 32x speed."

Also see: What are the capabilities of the optical drive provided by the iMac G4 models? How do you replace or upgrade the optical drive?
56k v.92 10/100Base-T
Details: Internal 56k v.92 modem and 10/100Base-T Ethernet standard.
802.11b/g (Optional) 1.1 (Optional)
Details: This model could be configured with AirPort Extreme (802.11g) and Bluetooth at the time of purchase at additional cost.

Also see: Which iMac G4 models support AirPort and which support AirPort Extreme? How do you replace or upgrade the AirPort card?
3 (2.0) 2 (400)
Details: This system has three USB 2.0 ports and two Firewire "400" ports (eight watts shared). Apple advertised that this computer had five USB ports -- three USB 2.0 ports on the computer and two USB 1.1 ports on the keyboard.
AP/BL None
Details: This model has expansion slots for AirPort Extreme (802.11b/802.11g) and Bluetooth.
Apple Pro Keyboard Apple Pro Mouse
Details: This model also shipped with Apple Pro Speakers.
All-in-One iMac G4 15" Flat Panel
Details: 10.6 inch (27.0 cm) half sphere ice white case with a chromed staineless steel neck that supports the display.
M9285LL/A iMac USB 2.0
Details: The Apple order number should be unique to this system.
N/A (EMC N/A) PowerMac6,1
Details: Please note that these identifiers refer to more than one model.

Also see: All Macs with the N/A Model Number, the N/A EMC Number, and the PowerMac6,1 Model Identifier.

For more about these identifiers and how to locate them on each Mac, please refer to's Mac Identification section.
3.6V Lithium N/A
Details: N/A
X 10.2.3 X 10.5.8
Details: This system cannot run versions of MacOS X more recent than 10.5.8.
Classic Mode Only* Emulation Only
Details: *This model is capable of using Mac OS 9 applications within the Mac OS X "Classic" environment provided with Mac OS X 10.4.11 "Tiger" and lower ("Classic" is not supported starting with Mac OS X 10.5 "Leopard"). It cannot boot into Mac OS 9.

Site sponsor OHS specializes in heavily upgraded Macs capable of running both Mac OS X and Mac OS 9 applications.
12.95 x 15.1 x 10.6* 21.3 lbs. (9.7 kg)
Details: *In inches - height x width x depth - minimum (32.9 cm, 38.3 cm, 27.0 cm). The maximum dimensions are 20 inches x 16.3 inches x 16.3 inches (50.9 cm, 41.5 cm, 41.5 cm).
US$1299 US$150-US$200
Details: Please note that on average the estimated current retail pricing of used systems is updated twice a year (please refer to the date on the bottom of the page for the date last updated).

Photo Credit: Apple Computer.

Click on the underlined category text for additional details. The most commonly needed info is "open" by default, but all info is important. The icons correspond with the icons for each port on the computer.

1 (Mini-VGA) None
Details: N/A
None None
Details: N/A
None None
Details: N/A
3 (2.0) 2 (400)
Details: This system has three USB 2.0 ports and two Firewire "400" ports (eight watts shared). Apple advertised that this computer had five USB ports -- three USB 2.0 ports on the computer and two USB 1.1 ports on the keyboard.
1 (RJ-11) 1 (RJ-45)
Details: N/A
None 1*
Details: S-video and composite video output to TV or projector requires Apple Video Adapter (sold separately).
1 (Built-in) 1
Details: One "audio line in jack".
1 1
Details: One "speaker mini jack" and one rear-mounted headphone jack.
1 None
Details: N/A
None None
Details: N/A
1 N/A
Details: 90V to 246V AC, 130W maximum.

Ten of the most popular Q&As about the iMac models follow.

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