For what it's worth:
My iMac 27" okay. My wife's iMac 21" very jagged. Well as she was complaining and I finally found a way to fix it [took a while
]:
System Preferences - Accessibility - Display - Enhance Contrast: Normal
She had it between Normal and Maximum.
My iMac 27" okay. My wife's iMac 21" very jagged. Well as she was complaining and I finally found a way to fix it [took a while
]: System Preferences - Accessibility - Display - Enhance Contrast: Normal
She had it between Normal and Maximum.