Retina Pixel Diagnostic
MacBook Dead Pixel Test
High-density Retina screen dead pixel checker for MacBook Pro, MacBook Air, and iMac displays.
Diagnostic Sequence Preview
This test automatically cycles through calibrated solid color surfaces.
Pure WhiteStep 1
Light Gray (82%)Step 2
Neutral Gray (50%)Step 3
Pure RedStep 4
Pure GreenStep 5
Pure BlueStep 6
Pure YellowStep 7
Pure CyanStep 8
Pure MagentaStep 9
Pure BlackStep 10
What to Look For
High-resolution Apple Retina displays pack over 5 million pixels. Finding a single dead subpixel requires pure solid color backgrounds and subpixel magnification.
- Tiny dark subpixels on bright solid backgrounds.
- Edge defects around MacBook display bezels.
- Color uniformity drops across the Retina panel.
Display Preparation Tips
- 1Disable True Tone in macOS Display Settings.
- 2Wipe screen clean with a dry lint-free cloth.
- 3Use Safari or Chrome in Fullscreen mode.
Frequently Asked Questions
How do I check my new MacBook for dead pixels?
Open PixelCheck365, click Launch MacBook Test, press Fullscreen, and cycle through the pure White, Red, Green, and Blue slides.
Ready to Check Your Screen?
Launch full-screen diagnostics right now to verify pixel health, backlight uniformity, and color fidelity across your entire display.
Start Free Screen Test