I am trying to upgrade Xcode from 10.1 to 11.0. Somewhere it says that I have to have iOS 10.14.6. (Currently my Mac is running High Sierra 10.13.6. And I have trouble to make Xcode 10.1 work with my iPhone 7 whiting is running 13.1.2.)
When I am trying to download macOS Mojave, I see the following message. After click OK, it seems that nothing happens.
I have MacBook Pro 2018.
What can I do to move forward?