So my 5k iMac screen got cracked, I ordered a new one to fit myself as the computer is out of warranty. I've attached it and its working but 5k resolution isn't available and when i click on the Displays setting in 'About this mac' it says that its 3840x2160. However when i go to resolution settings the max available one is 3360x1890 and that my default resolution looks like 1080p. However when i go to the system information screen it says its a 5k display... Anyone idea what could be going on ? Im bemused If anyone else here had a 5k iMac could you do me a favour and look at your display settings and see what your maximum scaled resolution is ?