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    Files

    To move your Fonts & Colors theme you need to copy

    ~/Library/Developer/Xcode/UserData/FontAndColorThemes/yourTheme.dvtcolortheme

    file from one system to another.

    For Xcode preferences as mentioned by one of the answers, you need to copy

    ~/Library/Preferences/com.apple.dt.Xcode.plist

    Xcode Pref locations

    Key bindings export
    https://stackoverflow.com/questions/4200735/is-there-a-way-to-export-xcode-key-bindings