Apple CEO Steve Jobs introduced two new iMacs at the start of an event held Tuesday at Apple's headquarters in Cupertino, Calif.

The 20-inch and 24-inch iMacs are the latest editions of Apple's all-in-one iMac design. They are made from aluminum and glass, and come with a new keyboard. Both the new keyboard and the iMac itself are thinner than the previous edition.

Three new iMacs will be available immediately, two 20-inch models and one 24-inch model. The base 20-inch version will cost $1,199, and a more powerful 20-inch model will cost $1,499. The 24-inch model will cost $1,799, $200 cheaper than the current 24-inch iMac.

Apple, Steve Jobs, iMacs, Desktop, PCs, Apple News

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