To install Chrome 21 on a Mac running 10.5.8, you must use legacy repositories or archive sites:
Chrome_for_10.5.8.dmg ├── ChromeLegacy.app ├── Certificate_Updater.app ├── Legacy_ReadMe.rtf ├── Uninstaller.app └── Extras/ ├── UserAgent_Switcher.crx (pre-downloaded) ├── NoScript_Legacy.crx └── Legacy_CA_Bundle.pem chrome for mac 10.5.8 download dmg
Offers specific archives of Google Chrome 20.0.1132.57 which is confirmed stable for Leopard. To install Chrome 21 on a Mac running 10