title: Can we use both Xcode 10.2.1 and Xcode 11 beta in new macOS Catalina 10.15 beta
body: <p>Currently I'm using macOS 10.14.5 and Xcode 10.2.1, the stable versions which Apple released. I'm wondering to install new macOS Catalina 10.15 beta and Xcode 11 beta for my Mac. But I want to keep both Xcode versions (Xcode 10.2.1 and Xcode 11 beta) because I'm doing updates for my apps every week which is currently in the App Store. </p>
  
  <ul>
  <li>If I upgrade the macOS to beta, would that be a problem for me to do
  updates for my apps in App Store?</li>
  <li>And is it possible to keep both Xcode versions in Catalina?</li>
  <li>And if I accidentally opened the project in Xcode beta, then would
  that be a problem when I open it in Xcode 10.2.1?</li>
  </ul>