What version of the MacOS is pre-installed on the iBook? Which iBook models can boot MacOS 9? Which iBook models can only run MacOS 9 applications in the "Classic" Environment?

All iBook "G3" models are capable of booting MacOS 9, whereas iBook G4 models can only boot a version of MacOS X and run MacOS 9 applications in the "Classic" environment. The version of the MacOS pre-installed, as well as the degree of MacOS 9 compatibility is provided on the specs page for each system.

However, this information also is provided in this handy chart for your convenience:

iBook	Pre-Installed	MacOS 9
G3/300 (Original/Clamshell)	8.6	Boot/Classic
G3/366 SE (Original/Clamshell)	8.6	Boot/Classic
G3/366 (Firewire/Clamshell)	9.0.4	Boot/Classic
G3/466 SE (Firewire/Clamshell)	9.0.4	Boot/Classic
G3/500 (Dual USB - Tr)	9.1*	Boot/Classic
G3/500 (Late 2001 - Tr)	9.2.1 & X 10.1*	Boot/Classic
G3/600 (Late 2001 - Tr)	9.2.1 & X 10.1*	Boot/Classic
G3/600 14-Inch (Early 2002 - Tr)	9.2.1 & X 10.1.2*	Boot/Classic
G3/600 (16 VRAM - Tr)	9.2.2 & X 10.1.4*	Boot/Classic
G3/700 (16 VRAM - Tr)	9.2.2 & X 10.1.4*	Boot/Classic
G3/700 14-Inch (16 VRAM - Tr)	9.2.2 & X 10.1.4*	Boot/Classic
G3/700 (16 VRAM - Op)	9.2.2 & X 10.2.1	Boot/Classic
G3/800 (32 VRAM - Tr)	9.2.2 & X 10.2.1	Boot/Classic
G3/800 14-Inch (32 VRAM - Tr)	9.2.2 & X 10.2.1	Boot/Classic
G3/800 (Early 2003 - Op)	9.2.2 & X 10.2.4	Boot/Classic
G3/900 (Early 2003 - Op)	9.2.2 & X 10.2.4	Boot/Classic
G3/900 14-Inch (Early 2003 - Op)	9.2.2 & X 10.2.4	Boot/Classic
G4/800 12-Inch (Original - Op)	X 10.3	Classic Only
G4/933 14-Inch (Original - Op)	X 10.3	Classic Only
G4/1.0 14-Inch (Original - Op)	X 10.3	Classic Only
G4/1.0 12-Inch (Early 2004 - Op)	X 10.3.3	Classic Only
G4/1.0 14-Inch (Early 2004 - Op)	X 10.3.3	Classic Only
G4/1.2 14-Inch (Early 2004 - Op)	X 10.3.3	Classic Only
G4/1.2 12-Inch (Late 2004 - Op)	X 10.3.5	Classic Only
G4/1.33 14-Inch (Late 2004 - Op)	X 10.3.5	Classic Only
G4/1.33 12-Inch (Mid-2005 - Op)	X 10.4.2	Classic Only
G4/1.42 14-Inch (Mid-2005 - Op)	X 10.4.2	Classic Only

*Please refer to the appropriate specs page for complete details.

If you need a system capable of running MacOS 9 applications or booting MacOS 9, please check out site sponsor Operator Headgap Systems, which specializes in refurbished, and often heavily upgraded, systems capable of booting in both MacOS X and MacOS 9. Site sponsor PowerMax also sells systems capable of running MacOS 9/Classic.

For more on MacOS 9, please refer to the MacOS 9/Classic Support Q&A.