This trackpad cable is for A1534 early 2015 12" Macbook Retina. Please read the number off the cable and ensure it matches 821-1935-12 or 821-1935-07.

A bad trackpad cable can

• Keep the keyboard/trackpad from working.
• Affect SMC reset so the machine cannot be turned back on properly after being shut down.
• Cause keys to work intermittently.

This cable very commonly corrodes.