Pls help me
How to install x code on macbook pro version 10.10.5
Highest Xcode on macOS 10.10.5 is 7.2.1
Use this link [https://developer.apple.com/download/more/ ], then search there for Xcode 7.2.1 (note that access may require a paid Developer Program account).
Download to your mac, then mount the image.