iMac G5 1.83 GHz
20 inch display
GeForce FX 5200 64MB VRAM
Mac OS X 10.4.8 with all the lates updates as of 12.26.2006
For some reasons the Displays System Preferences only allowed two different resolutions: 640×480 and 1680×1050.
None of the following steps able to fix the problems:
- Deleting display preferences (com.apple.preference.displays.0011247aabd0.plist etc)
- Replace Display.prefPane (/System/Library/PreferencePanes/Displays.prefPane)
- Resetting NVRAM
- Zapping PRAM
- Use AppleJack to repair permissions, etc.
The solutions is much simpler than the steps above. Install Mac OS X 10.4.8 Combo Updater again.