Apple Users

I'm assuming that the native resolution of LG is 1920x1080 (ie a "16 " ) monitor. 1440x900 is a standard 16:10 apple resolution - I have a 1080p monitor, but 1440x600 in on my resolution list , it's the native resolution of a 13" MacBook air - and has been around since the 17" MacBooks.

I have found apples HMDI to DVI can be a bit flaky. In the end, I bought a MiniDP to DVI adapter. However, the HDMI route should still work.

1. Apple always starts by saying, resetting the parameter RAM . Shut down, then restart holding down Apple-Option P R and keep holding the keys down through four startup chimes.

2. The next advice given, is to boot in safe mode - holing down shift. Look at the resolutions again.

3. Leaving aside the (1, 2) boilerplate - the best way to see if's a software issue is - Create a new user, In Users and Groups control panel. Call it anything - like Test. When you log into that account for the first time, you will have a pristine set of user preferences, including display preferences.

I'd suggest, creating the new user, then shutting down. After restart, select Test as the user. Then see if the resolutions behave. If they do, you can think about migrating data, or replacing preferences.

If it's not fixed, it's more likely hardware. If you post back, I can suggest more steps.