I know Flash is no longer supported on this platform but will any version work? After installing, reboot your Mac and relaunch Safari, then in Safari Preferences/Security enable ‘Allow Plugins’. I have a Power Mac G5 non intel with Mac OS X 10.5.8 running Safari Browser Version 5.0.6 (5533.22.3) I've tried downloading several different versions of Flasj Player but nothing works.