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Mac os x lion external display bug

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And if you happen to do that to your startup drive, your Mac won't boot. We're going to show you two ways to fix a drive that was set to no access. The first method assumes you're able to start your Mac using another startup drive or an install DVD.

You can use the second method if you don't have access to another startup device. Boot your Mac from another startup device. You can do this by starting your Mac and holding down the option key. A list of available startup devices will display.

How to Show All Possible Screen Resolutions for a Display in Mac OS X

Select a device and your Mac will use it to finish booting. Once your Mac displays the desktop, we're ready to correct the permissions problem. Enter the following command in Terminal. Note that there are quotes around the startup drive's path name. This is necessary to ensure that if the drive name contains any special characters, including a space, that it will work with the command. Be sure to replace startupdrive with the name of the startup drive that is having problems:. You will be asked to provide your administrator password.

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Enter the information and press enter or return. If you don't have another startup device to use, you can still change the startup drive's permissions by using the special single-user startup mode. Continue to hold both keys down until you see a few lines of scrolling text on your display.

It will look like an old-fashioned computer terminal. If you still have problems, try repairing the startup drive using the methods described earlier in this article. Share Pin Email.

OS X Lion Full-Screen App Mode Doesn’t Play Well With External Displays

Tom Nelson has written hundreds of articles, tutorials, and reviews for Other World Computing and About. He is the president of Coyote Moon, Inc. Updated February 15, Be sure to replace startupdrive with the name of the startup drive that is having problems: Press enter or return. Enter the following command again, replace startupdrive with the name of your startup drive. Your startup drive should now have the correct permissions and be able to boot your Mac. Start your Mac while holding down the command and s keys. At the command prompt that appears once the text has stopped scrolling, enter the following: Posted by philastokes.

The old fridge magnet trick As I often use a tiny magnet to put my MBP display to sleep while keeping the lid open, normally putting the magnet on and then taking it off again will cause the displays to reset. When your mac wakes up and the monitor is in the wrong resolution, move the cursor to the Hot Corner, wait a couple of seconds, and move the cursor back to the centre of the screen.

After the display resets properly, quit System Preferences.

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Fortunately, you can lower the inconvenience with the second way, which is an AppleScript that does the same thing automagically. Update Jan The script below is built into DisplayDroid as one of the presets that you can choose! Find out more about DisplayDroid…. You might want to save this in your scripts menu or make it into a Dock-able app for convenience.

A free screen utility Unhappy with a GUI scripting solution, I started researching how to change the displays in Cocoa or from the BASH command line so that I could avoid the overhead of System Preferences popping open and closed, which is an ugly solution at best.

OS x mountain lion dosen't detect externa… - Apple Community

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Big respect to Paul Griffin at http: Trash old prefs No matter how well or otherwise any of these techniques work, the question remains: Also, this is the Library folder at the root of your hard disk and NOT your user account library i. Check that path. Here it is again. OK, click on that folder, and copy it over to your Desktop. Related Posts: DisplayDroid from Applehelpwriter Featured Picture: Bookmark the permalink.


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I just turn the external monitor OFF, wait 30 seconds and then turn it back on. Then go into display preferences and set the correct resolution. Hopefully Apple will fix this in El Capitan. Wow, the apps you shared works just how I want it. Thank you very much. I see that the developer himself did not put the app for public. Thanks again.