IMac G5
The original iMac G5 with an Apple Wireless Mouse.
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| Developer | Apple Inc. |
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| Type | Desktop |
| Release date | August 31, 2004 (original models) May 3, 2005 (Ambient Light Sensor model) October 12, 2005 (iSight model) |
| Discontinued | January 10, 2006 (17" model) March 20, 2006 (20" model) |
| CPU | PowerPC G5, 1.6–2.1 GHz |
| Predecessor | iMac G4 |
| Successor | Intel iMac |
| Website | www.apple.com/imac/ at the Wayback Machine (archived September 1, 2004) |
The iMac G5 is an all-in-one desktop computer designed and built by Apple Inc. from 2004 to 2006. It was the final iMac to use a PowerPC processor, making it the last model that could natively run Mac OS 9 (Classic) applications. It was replaced in 2006 by the Intel iMac.
In August 2004, the iMac design was overhauled. By this time, the PowerPC 970 processor had been released and was being used in the Power Mac G5 line. Famously, the Power Mac G5 needed multiple fans in a large casing (or else liquid cooling, an innovative solution Apple adopted for the highest-end Power Mac G5s) because of the high heat output from the PowerPC 970.
Apple's new iMac managed to incorporate the PowerPC 970 into an all-in-one design with a distinctive form factor. The computer used the same 17 and 20-inch widescreen LCDs found in the iMac G4, with the main logic board and optical drive now mounted directly behind the LCD panel; this gave the appearance of a thickened desktop LCD monitor. The approximately two inches deep enclosure is suspended above the desk by an aluminum arm that can be replaced by a VESA mounting plate. The iMac G5 uses an advanced cooling system controlled by the operating system; at low CPU loads this rendered the iMac G5 virtually silent. Apple boasted that it was the slimmest desktop computer on the market.
The iMac G5 was updated in March 2005 to the Ambient Light Sensor (ALS) revision. It included a handful of configuration differences - more RAM, a larger hard drive, improved graphics, Gigabit Ethernet, and standard AirPort Extreme (802.11g) and Bluetooth 2.0+EDR.
In October 2005, the final revision was released, adding an integrated iSight webcam mounted above the LCD and Apple's Front Row media interface. Other improvements included faster processors, more RAM, larger hard drives, and improved graphics. Notably this became the first Apple computer to use the PCI Express expansion bus and DDR2 SDRAM, with these features appearing shortly before they were incorporated into the Power Mac G5. It was declared "The Gold Standard of desktop PCs" by Walt Mossberg of the Wall Street Journal.
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