Follow below step
PS: I kindly advise that do not erase everything like this step said since the info from other of your projects could be in the same folder and being deleted alone with this execution.
1) Clean?Derived Data?as show below,
rm -rf ~/Library/Developer/Xcode/DerivedData/OR
Xcode---> Preferences--->Location--->Derived Data
2)?In Deployment Info change?Deployment Target
It's?equal?to or?less?then the?SDK?version of?Xcode
3)?Quit?Xcode
4) Reopen?Xcode?you will see list of?simulators
Hope this is help for some one.
ref:?https://stackoverflow.com/questions/26690730/xcode-project-not-showing-list-of-simulators
