Step 1: Open System Preferences
In System Preferences click the Displays icon. A preference pane opens that is named after your currently-active display, Color LCD in this tutorial.
Step 2: Navigate to the Display section
In the Displays preference pane, the Display tab is not relevant here, therefore select the Color tab to access the calibration facility.
Step 3: Check everything is in order
Ensure everything is plugged in, turned on and that you have installed all relevant software as per the display’s manufacturer requirements.
Step 4: Detect your new display
If your display does not appear in the profiles list, click the Detect Displays button. Select the profile named after your display once it appears.
Step 5: Display Calibrator Assistant
Click the Calibrate button and new software appears in the Dock. It is called the Display Calibrator Assistant and will help you create a valid ICC profile.
Step 6: Expert mode
In the first Display Calibrator Assistant window, you can make the calibration more thorough by selecting the Expert Mode tick box. Click Continue.
Step 7: Select a target gamma
In this window, adjust the degree of difference between tones, known as contrast. The default value of 2.2 suits most displays. Click Continue.
Step 8: Select a target white point
White point selection lets you define the location of the white point from the visible colours range. Native and D65 are preferred in most cases. Click Continue.