Software update of MacBook Pro (Retina, 13-inch, Late 2013)

Update macOS on Mac

1. From the Apple menu  in the corner of your screen, choose System Preferences.
2. In the System Preferences window, click Software Update. If your System Preferences doesn't include Software Update, use the App Store to get updates instead.
3. Click Update Now or Upgrade Now:

https://support.apple.com/en-us/HT201541