This is an OS X 10.6.8 disk image from the MacRumors OS X 10.6 for PowerPC development thread. Currently it's in the "Alpha 5" stage of development, so not everything will work. This is unofficial and prone to crashes and even DATA corruption so DO NOT USE WITH IMPORTANT FILES.
Original thead: MacRumors
Instructions as per Macrumors:
Installation Instructions
IMPORTANT: Always back up your whole hard drive before installing any operating system.
A. Install Snow Leopard using hard disk partitions:
Requirements:
- PowerPC G4 or G5 based system
- Two hard disk partitions internal or external (or 2 separate drives)
Hard disk partitions setup:
Partition 1 - 10.5.8 System Containing the downloaded Snow Leopard disk image on the internal drive, or on a connected external USB/Firewire device.
Partition 2 - Restore the disk image onto this partition (IMPORTANT: All data on this partition will be erased!)
Procedure:
1. Boot off partition 1 then, using Disk Utility, select ‘Scan image for restore’ and then restore the Snow Leopard Disk Image onto partition 2 using the ‘erase & restore’ and ‘block copy’ options.
2. Select partition 2 as the boot device and boot into Snow Leopard to complete the setup process.
Note: Use System Preferences : Startup Disk in 10.5.8 Leopard to pick startup volume or hold down the ‘Option (⌥) or Alt’ key when powering on the system to select a boot volume using the Boot picker.
DISCLAIMER:
THE BETA SOFTWARE HEREUNDER IS KNOWN TO CONTAIN DEFECTS AND THE PRIMARY PURPOSE OF THIS BETA TESTING IS TO OBTAIN FEEDBACK ON SOFTWARE PERFORMANCE AND THE IDENTIFICATION OF FURTHER DEFECTS. USERS ARE ADVISED TO SAFEGUARD IMPORTANT DATA, TO USE CAUTION AND NOT TO RELY IN ANY WAY ON THE CORRECT FUNCTIONING OR PERFORMANCE OF THE SOFTWARE AND/OR ACCOMPANYING INFORMATION AND MATERIALS CONTAINED IN THIS THREAD .
ALL SOFTWARE MADE AVAILABLE FOR DOWNLOAD IS STILL IN THE TESTING PHASE AND IS PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS. ANY DAMAGES OR LOSSES INCURRED BY THE USER ARE THE SOLE RESPONSIBILITY OF THE USER. THE USER ACCEPTS NO WARRANTY OR GUARANTEE OF ANY KIND IS PROVIDED WITH THIS SOFTWARE.
(724.46 MiB / 759.65 MB)

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2024-11-27 /

45cda2df9bfb5e1c0444e71f7a04edb929d91bb0 /

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(3610.37 MiB / 3785.75 MB)
Mac OS X 10.6.8 for PPC (Alpha 5, Macrumors) / DMG image

0 /

2025-04-25 /

131ee805d0a9fae7d9707335235d52f5e7bc39f8 /

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Architecture 

IBM PowerPC
Compatibility notes 
Architecture: PPC (G4 from 2002 or newer, or any G5)
At least 1GB of RAM
Emulating this? It could probably run under:
QEMU