How to Calibrate Mac OS Monitor

Step 1: Click on the Apple logo in the top-left corner of your screen. Then select System Preferences.
      


Step 2: Next, click Displays. This will open up the Built-in Display menu for non-Retina models or the Retina Display menu for Retina models. The menu opens to the Display tab by default.



Step 3: Select the Color tab. Click the Calibrate button while holding down the Option key on your keyboard.
This will open the Apple Display Calibrator Assistant in Expert Mode. Expert Mode gives you access to more color calibration features.


Step 4: Then click Continue. You will click Continue after completing each of the following steps.
If you don’t see this screen, go back and make sure to hit the Option key while clicking the Calibrate button.



Step 5: Set up Native Gamma. For this setting, it will help to squint or move at least three feet away from your display.
Adjust the left slider until the brightness of the Apple logo matches the background.
Next, adjust the right slider until the shape of the Apple logo is neutral compared to the background.



Step 6: Set up Target Gamma. This setting lets you adjust the overall contrast of your display.
The assistant will instruct you to check the picture to the right of the menu to see how different contrast options affect the display.
You will also see the numerical gamma level after the Use native gamma checkbox.
You can move the slider around until you reach your desired contrast.
As you adjust the contrast, you will also see the changes updated in real-time on your display.



Step 7: Choose a white point. Here, you can customize the overall color tint of your display.
By default, the checkbox for Use native white point is enabled. To customize this, uncheck the box,
then choose a white point by moving the slider around. You can also choose from three standard white point presets of D50, D65, and 9300.



Step 8: Name the Display profile. If you want to save the calibration settings, you can assign a name to it.
The next time you want to use it, simply look for it from the Display pane in the Color tab.



Step 9: Check your Profile Summary. The Display Assistant will give you a summary of your calibrated settings in the Conclusion tab.
You can hit Go Back if you want to change a setting. Otherwise, click on Done to quit the calibrator.




Credit : https://www.hellotech.com/guide/for/how-to-calibrate-monitor-mac