If you need newer Xcode:

Many users look for Xcode on High Sierra simply because they need the to run package managers like Homebrew, compile C++ projects, or use Git. If you do not need the full visual IDE interface, you can save massive amounts of disk space by installing only the tools. Method A: Via Terminal (Easiest) Open the Terminal app (found in Applications > Utilities). Type the following command and hit Enter: xcode-select --install Use code with caution.

Once downloaded, double-click the Xcode_10.1.xip file. It will take some time to expand/unzip.

Getting Xcode installed is only half the battle. You need to configure it so Terminal and other tools can find it.

Xcode 10.1

Steps

Once expanded, drag the app icon into your Applications folder. Compatibility and Limitations