Bad Monitor Profile, unable to read the screen on Mac OSX
Profiled the monitor with the ColorMunki Display and now the screen is unreadable on Mac OSX.A bad profile can occur when users have the device on the screen backwards or if there is a conflict with ADC. The simplest way to remove the corrupted profile is to boot up the computer in safe mode and delete the file itself. Follow these steps to start up into safe mode.
Start or restart your Mac.
Immediately after you hear the startup sound, press and hold the Shift key.
Release the Shift key when you see the Apple logo appear on the screen.
After the Apple logo appears, it might take longer than usual to reach the login screen or your desktop. This is because your Mac performs a directory check of your startup disk as part of safe mode. To leave safe mode, restart your computer without pressing any keys during startup.
Once the computer is completely booted up navigate to this location: Users>Library>ColorSync>Profiles
Locate the bad profile and delete it to the Trash bin. Reboot the computer and it will load the generic profile that came with the monitor. These are hidden Library folders however, the easiest way to temporarily reveal the ~/Library folder is to open Finder. On the menu bar, at the top, select Go to reveal the drop-down menu and then hold down the Option key (marked ALT) and you will see the ~/Library folder appear. You may now select this ~/Library folder with your mouse or trackpad.
As soon as you release the Option key, the ~/Library folder will be hidden once more.
After that is complete go back into the ColorMunki Display software to reprofile the monitor once again. Make sure that when you place the device on the monitor the side of the device with the felt around the glass should be lying flat on the screen while the white ambient light cover is facing outward. Here are the recommendations to re-profile that will help avoid this issue moving forward.
1. On Mac…go to “ColorMunki Display” in the menu bar and click on “Preferences”. 2. Uncheck “Achieve display luminance value using video LUTs” and uncheck “Enable ADC”. Select “White LED” for your Technology Type if it is an Apple display manufactured after 2009 . Click “OK” to save these settings and close the “Preferences” window. 3. Select “Profile My Display”. 4. When profiling, select the “Advanced” method and use D65 for the white point and select the bottom radio button to choose a target luminance of 120 cd/m2. 5. Uncheck both of the “Advanced Options” (Ambient Light Smart Control and Flare Correct) and click “Next”. 6. When saving the profile, use a unique name (i.e., insert the month and year BEFORE the “.icm”). The profile name MUST end with “.icm”.
The recommended display profiling settings of a D65 white point, 2.2 gamma, and 120cd/m2 has been set by the industry experts. The photographers and graphic designers of the world have determined that a monitor profiled to these parameters will most closely match a print that is viewed in a 5000K light booth (Graphic arts standard). The default gamma (aka; tone response) is set at 2.2 in ColorMunki’s Preference menu found in “File” > “Preferences” from the home screen. We would recommend using the Advanced method and select the bottom option to set luminance to a specific level and then select “120”. If your prints are darker than your display, feel free to try a lower display luminance setting of 100, 90, or even 80.
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