Chosen Solution

I just finished replacing my cracked imac late 2012 screen. The computer posts but everything is huge and pixelized. When I get to display under system pref, there are no resolutions under scaled. I have no idea whats going on.

  1. Choose Apple menu > System Preferences, then click Displays.
  2. Click Display, click Scaled, then select a resolution. Some apps may not fit entirely on the screen in some scaled resolutions.

That looks like a driver issue. Either you need to install some drivers for that new screen, or your gpu has failed and your computer is using your logicboard to output video.