Extra Steps for Xcode versions from Apple Developer Site

For non-App Store variants, there are a bit more work needed to make this a easier. If you downloaded straight from the App Store, skip this

  1. Copy the "Xcode.app" to "/Applications"

  2. To speed things up, open terminal, and type "cd /Applications"

  3. Then "sudo xattr -d com.apple.quarantine /Applications/Xcode.app" (Without quotes).

Depending on the combination of your Xcode version and iOS version, you will need to download the iOS support files (This is only a Google Link that has the correct search term). (Example: Xcode 8 with iOS 13)