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AmigaOS 4.0 was released on December 24, 2006 after five years of development by Hyperion Entertainment (VOF (Belgium) under license from Amiga, Inc. for AmigaOne registered users.

During the five years of development, users of AmigaOne machines could download from Hyperion repository Pre-Release Versions of AmigaOS 4.0 as long as these were made available. As witnessed by many users into Amiga discussion forum sites, these versions were stable and reliable, despite of the fact that are technically labeled as "pre-releases".

Last stable version of AmigaOS 4.0 it is the so called "First Update", released for download 18 July 2007 to the registered users of AmigaOne machines

AmigaOS 4 was released commercially for Classic Amigas with CyberstormPPC and BlizzardPPC accelerator cards in November 2007. It had previously been available only to developers and beta-testers.

In December 26th 2006, Amiga, Inc terminated the contract of Hyperion to produce or sell AmigaOS 4. Currently (April 2008), the future of the OS is in doubt as litigation continues.

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AmigaOS 4.0 Branch
Preceded by
AmigaOS 3.x
AmigaOS 4.0 Followed by