• iBook G4 (12-inch Mid-2005)
• https://everymac.com/systems/apple/ibook/specs/ibook_g4_1.33_12.html

• Machine Model: PowerBook6,7
• CPU Type: PowerPC G4 (1.5)
• CPU Speed: 1.33 GHz
• Memory: 1 GB
• Boot ROM Version: 4.9.3f0

• ATI Mobility Radeon 9550

• Chipset Model: ATY,M12
• VRAM (Total): 32 MB
• Device ID: 0x4e56
• Revision ID: 0x0080
• ROM Revision: 113-xxxxx-117

• https://macintoshgarden.org/apps/mac-osx-mac-os-10-ppc
• Tiger_CD1.toast_.zip (433.84 MB)
• Tiger_CD2.toast_.zip (575.86 MB)
• Tiger_CD3.toast_.zip (585.43 MB)
• Tiger_CD4.toast_.zip (171.70 MB)

• Essential System Software with nothing else selected requires CD1 and CD2 at a minimal ¹⁾

• Mac OS X Tiger (10.4.11)

• Booting macOS ²⁾ from OpenFirmware or Option-key-hold boot menu causes corrupted graphics ³⁾
• 10.4 Tiger requires an external mouse for install ⁴⁾
• Disk Utility has a long delay with loading disk info if internal HDD is formatted Unix File System (not Mac OS Extended)

• https://github.com/andreafabrizi/G4FanControl
• 35 all 3 sensors

• https://macintoshgarden.org/apps/sorbet-leopard
• https://lifedigital2010.wordpress.com/2011/04/03/how-to-install-mac-osx-from-usb-on-powerbook-g4/
• Sorbet Leopard copies to USB as a pre-installed OS ⁵⁾
• Carbon Copy Cloner (CCC) can be used to restore an OS-mounted Sorbet dmg to internal HDD ⁶⁾

• Internal HDD install: Copy to USB → boot Sorbet Leopard from USB → restore USB to internal HDD (Disk Utility) → Fix permissions → Reboot into HDD install

boot usb0/disk@1:3,\System\Library\CoreServices\BootX