MacBook Screen Test
Run a comprehensive display quality check optimized for MacBook screens.
Dead pixels, color uniformity, backlight bleed, and gradient banding on Retina displays. Click Start Test and work through each visual test pattern in a darkened room.
What does this test measure?
Dead pixels, color uniformity, backlight bleed, and gradient banding on Retina displays.
Why is this test important?
Run a comprehensive display quality check optimized for MacBook screens.
How do you run the test?
Click Start Test and work through each visual test pattern in a darkened room.
How should results be interpreted?
Any colored dots, uneven patches, or corner glow should be noted for warranty claims.
Normal and problematic results
Any colored dots, uneven patches, or corner glow should be noted for warranty claims.
Technical limitations
True Colors and P3 color accuracy require calibrated measurement hardware.
Why can the score decrease?
Unstable measurements, denied permissions, unsupported browser APIs, background load, power saving, or an incomplete test can affect the result. When a score changes, the result screen explains the reason.
What should you do if a problem is found?
Report dead pixels or backlight issues to Apple for warranty service.
Example Result Explanation
Frequently Asked Questions
Does this test provide a definitive hardware diagnosis?
No. The test measures signals the browser can safely access and clearly explains its technical limits.
Why can results change between runs?
Background applications, power mode, network conditions, permissions, and operating-system timing can affect results.
How should I repeat the test if I see a problem?
Repeat it on the same device and browser while changing only one condition, so the source of the difference is easier to identify.