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I recently got a Dell 2412m monitor with a screen resolution of 1920 x 1200. But in system preferences it only shows 1920 x 1080. I had it connected, beautifully, to my spare linux machine, so that's not the issue.

How can I get the correct resolution on my display?

Specs: Dell 2412m Mac OS X 10.7.2 Connecting with MiniDisplay Port to VGA

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2 Answers 2

You are unlikely to be able use the VGA input to go above 1080p

But just to make sure follow this answer how to view more Resolutions to try with.

MacBook Pro with Retina display (Late 2012) not outputting anything above 1080p

Select the monitor in System Preferences:

System Preferences -> Displays -> Monitor(not Built-in Display) -> Display Tab -> Resolution

Change from 'Best for Display' to 'Scaled' whilst holding the 'alt' key, more resolutions will be listed for you to select

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Alt Key secret works. – Artru Jul 12 at 23:03

For whoever still has the same problem, just unplug and plug again the minidisplay adaptor into your Mac. I had the same problem with a smaller Dell and that does the job. P

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The issue is not that it is not connecting. It is that the correct resolution is not displaying. Your answer does not resolve that issue at all. – sameetandpotatoes Aug 22 '13 at 23:29

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