Q: How do i fix a dead pixel on my macbook

Replace the screen.

Pete

See:

About LCD display pixel anomalies for Apple products released in 2010 and later - Apple Support

Dead pixel is a kind of Hardware fault. The only way to fix the dead pixel issue on a retina display would be to replace the entire display unit.

If its under warranty then it will be covered for free or else the repair will be quite expensive. Somewhere around $700 just for the display unit.

You can also try to get it fixed for a flat depot repair of $350 if Apple agrees. Cant guarantee though......

Hope this helps......

Is your MacBook still under Apple Warranty (AppleCare)? If not, unfortunately a dead pixel is something you are going to have to live with unless you are prepared to have the screen replaced, I would recommend an Apple Authorized Service Provider or Apple Retail Store however you may find cheaper elsewhere. I would recommend first taking it to Apple and have them diagnose it and see what they can suggest.

Good luck!