Release date: Pre-Release Updates: 1 (Oct. 10, 2004) | 2 (Dec. 27, 2004) | 3 (June 14, 2005) | 4 (Feb. 8, 2006)

Shipped with: New AmigaOnes since June 2004

Media: Kickstart on disc

Major enhancements:

• Added: AmiGS, AmiPDF, and Ghostscript now system apps.
• Added: Dockies and Subdocs
• Added: Integrated 680x0 emulator for execution of legacy code.
• Added: Integrated TCP/IP stack.
• Added: MediaToolbox and PartitionWizard (replace HDToolBox and third party utilities such as DiskSalv).
• Added: MUI.
• Added: Pop-up menus with PowerMenus Commodity.
• Added: Ported to PowerPC with removal of all chipset dependencies.
• Added: S:ARexx inherits Rexxc in C: and ARexx scripts.
• Added: SmartFileSystem.
• Added: Solid window resizing/dragging.
• Added: Support for Truetype and Postscript fonts, with optional anti-aliasing (TypeManager replaces Intellifont).
• Added: Supports different character sets, including full ISO-8859-15 (Euro support).
• Improved: AmiDock
• Improved: AmigaDOS implemented without BCPL TripOS legacy code.
• Improved: CDFS (with support for ISO9660, UDF, HFS, CDDA etc), CD/DVD writing support, can boot from CD/DVD, drives are auto-mounted.
• Improved: GUI appearance completely reconfigurable, and consistent across ReAction and GadTools based apps, you can also now drag windows off screen.
• Improved: Reimplemented FastFileSystem with long filename support and no partition/drive size limits.
• Improved: The Guru is replaced with the Grim Reaper, a massively enhanced version of the old "Suspend/Reboot" requester.

Example media:

1. Maria Engström shares the following Easter egg in the U-Boot (ROM/BIOS) of the AmigaOne computers that run AmigaOS4 (therefore not really in Workbench itself). You can activate it by typing in the following on the UBoot prompt (] is the prompt symbol):

   ] setenv easteregg 1
   ] saveenv
   ] reboot
   

   The next time the AmigaOne computer is rebooted, the screen will look the startup-screen of a Commodore 64. Deactivating the Easter egg is done by typing:

   ] setenv easteregg
   ] saveenv
   ] setenv x86_mode
   ] setenv vga_fg_color 7
   ] setenv vga_bg_color 0
   ] saveenv
   

   The colors after vga_XX_color can be combined from a palette of 16 colors and they are the same as the standard ANSI palette.

1. Chris Young notes that AmigaOS 4.0 "developer pre-release" edition for AmigaOne was released on June 2, 2004. He adds that, in a similar way to the A1000, and (to a lesser extent) early 2.x releases on the A3000, the ROM does not contain any part of AmigaOS and merely loads Kickstart from disk.