The anti-reflective display coating on some MacBook systems may separate from the glass panel over time, leaving a notable permanent discoloration on the display. When this occurs, the discoloration may spread quite easily as the separation expands. Given that Apple has used anti-reflective coatings on many MacBook systems (both retina and non-retina), this problem may be a potential issue for many people.
The problem is somewhat difficult to see under most room lighting conditions, so to view it, go outside or near a window where you will get ample natural light, and turn off or sleep your Mac (or simply dim its display). Then look at a direct reflection of the natural light on your display. If you see light patches and streaks around the corners and edges of your display, then you might be experiencing this issue.
Unfortunately, if the problem is from coating separation, then it cannot be fixed without servicing, and you can only take steps to prevent further damage by being as gentle with your screen as possible. This means not only avoid pressing and rubbing it, but also open the display as gently as possible and avoid any twisting or torsion forces that could even slightly bend the glass surface.
To prevent this issue from occurring, try sticking to the following approaches for caring for your display:
- Avoid using or storing your Mac in direct sunlight.
- Avoid extreme temperatures, such as storing your Mac in the hot trunk of a car, or leaving it in freezing temperatures.
- Avoid pressing, poking, or scraping your display.
- Do not lift your Mac by its display.
If you are experiencing this issue and are looking to have it fixed, then you may be met with inconsistent support from Apple. According to MacRumors, some who have had this issue have been told this is cosmetic damage that is not repairable under Apple’s warranty services, whereas others have had their systems fixed.
This issue and the response from Apple has spurred the development of a Web site called “Staingate” that is attempting to spread word about this issue and hope Apple steps up to handle it properly. Recently, such actions for graphics issues in many MacBook systems caused Apple to eventually address the problem, so perhaps this effort will have similar results.