Xcode 12 - Download more simulators runtime is empty

Question

I can't add more simulator OS version in XCode 12, for example iOS 13, the list is empty:

how can I add more simulatore with different ios version?

Answer 1

I had exact same problem, apple returns empty list of simulators. Here is what I did:

1. First install xcode-install gem (follow readme):

   $ gem install xcode-install
   

2. Then check what iOS simulators are available:

   $ xcversion simulators
   

3. Finally install desired simulator i.e:

   $ xcversion simulators --install='iOS 13.5'
   

Answer 2

I had similar problem. As I remember in older Xcode easy option to add devices. in Xcode 12.X you can just go to Xcode -> Preference -> Component -> Select OS

See below 👇🏻