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Hadn't seen this solution anywhere which worked for me and a coworker. Check to see if there are any updates for your mac. I had a security update that I was not aware of so I updated and restarted without my monitor connected and it started up just fine.


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Press and hold the Option-Command-P-R keys immediately after powering on. This will reset the login screen resolution


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You can install John Ford's screenresolution utility via brew install screenresolution. Alternatively you can download and compile the source here. Once the utility is installed you can see all available resolutions via screenresolution list. Assuming the appropriate resolution is listed you can set you display with something like screenresolution set ...


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Try to force RGB mode on MacBook. Here is how: http://www.ireckon.net/2013/03/force-rgb-mode-in-mac-os-x-to-fix-the-picture-quality-of-an-external-monitor


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I have got the same problem. It is not that big of a deal to change it everytime, but it still is pretty annoying. Sometimes it doesn't happen, but most of the times it does. This morning when I turned on my macbook, it started in my "more space" resolution. When I connected my second screen, display mirroring was turned on (something I never use and don't ...



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