iMac resolution problems.
I can no longer select 1920 x 1080 as a resolution option for my external display. I'm using iMac mid 2011 27 " using Mavericks and LG W2442PA. Firewire to HDMI. Has worked for the last 2 years with no problem. Suddenly not. The option to select this resolution is no longer available. I can select other resolutions, but they distort the image and do not offer full screen resolution. I think this may be a problem with Mavericks on the last update. Does anyone have a suggestion?
iMac, iOS 7.0.6