Preference Panes can't be opened, says it doesn't work on PowerPC I can't open my network preferences anymore. It says that Network Preferences don't work on a PowerPC-based Mac, whereas it's actually an Intel. (2.0 ghz core 2 duo, 10.6.7) I've tried the following:


repair disk permissions
reset PRAM
Trash network .plists
copied Network.prefpane from other Mac and replaced it


And nothing of these changed a thing. Ethernet still works. I can't find anything online either about it. Anyone has an idea?

EDIT: now I can open hardly any of the preference panes. Only Bluetooth, MobileMe, Parental Control and Universal Access still work.
System Preferences may be running in Rosetta (the PowerPC-on-Intel emulation environment). Do a Get Info on the System Preferences app (in the Applications folder) and check two things.


The "Kind" should say Application (Universal).
There may be a checkbox saying something like "Open using Rosetta". Make sure this is unchecked.