This file is located in /System/Library/Displays/Overrides/ and is the last modified file, that you can find if you sort by date. This will delete all changes that you have made for this monitor.Īs a last resort, if you can't even start SwitchResX itself, you'll have to delete the monitor profile that you modified when you created a new custom resolution. If nothing above works, try to press the "reset" or "factory defaults" button in SwitchResX Control for your monitor. You can remove this file to get back the standard resolution in your user account. If this solves the problem during the reboot, but not in your user account, a similar file named ".plist" exists in your own /Users/yourname/Library/Preferences/ByHost folder. The file named Library/Preferences/ contains the resolution that the System tries to use at startup. Release the shift key when you see the "spinning gear" on the startup screen. When you hear the startup tone, hold down the shift key. ![]() To do that, turn your system off, then restart. Is my monitor destroyed ? How can I go back to the light ?Ī: First, try to reboot in safe mode. Q: I've defined a new resolution and rebooted, and the system boots with a black screen. This will Shutdown, -Restart type down, at time Now. This ought to fill in the rest of the line with the filename, if it doesn't, post here and I'll update the instructions accordingly We want to delete the ".plist" file, where the Xs represent your computer's hardware MAC address.Ħ) Type "rm /Users/>/Library/Preferences/ByHost/"> If there's only one other one there, well, that makes it easy. Choose the one that belongs to your account. You'll see "Shared" and some number of other users. This will Mount, -Write access, -Update the already mounted filesystem /ĥ) Figure out your short user name by typing "ls /Users/" you'll need it in the next step. (However, because you don't have a disk problem, this is most likely just a formality before you can mount your hard drive) Now that we've determined the hard drive is clean, let's mount it read/write If it doesn't say your hard drive is OK, then run the command again until it does. This will run a File System ChecK, -Force run, -answer Yes to all questionsģ) That should report back something like "Macintosh HD is OK!" or whatever. To change this.Ģ) Type "/sbin/fsck -fy" (without the quotes) You'll see a whole bunch of text fly by By default, your hard drive is mounted as read-only. This would help with a disk problem, but not with an improperly configured display problem.
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