The whole range will see faster Intel Core 2 Duo processors with 6MB L2 cache and a faster 1066 MHz front-side bus, while 2GB of memory will be standard in most models. The 24-inch iMac now offers 3.06 GHz Intel processor and the high-performance NVIDIA GeForce 8800 GS graphics as options.

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"The iMac's gorgeous aluminium and glass all-in-one design has been an incredible hit with our customers and is just one of the reasons Mac sales are growing three and a half times faster than PC sales," said Apple's senior vice president of Worldwide Product Marketing Philip Schiller.

"With the latest Intel processors, a faster new graphics option and more memory, customers now have even more reasons to love the iMac."

The updated iMac range includes built-in AirPort Extreme 802.11n Wi-Fi networking, Bluetooth 2.1+EDR; Gigabit Ethernet; built-in iSight video camera; a total of five USB 2.0 ports (including two on the Apple Keyboard); and one FireWire 400 and one FireWire 800 port.

RRP: from $1,599

See: www.apple.com.au