Xcode can build a project but can't run it on simulator

Question

When I download a project from the web, sometimes it can be built but doesn\'t run (XCode -> Product -> Run is disabled, in grey). This never happens when I create projects myse

Answer 1

In my case the issue was really simple, I needed to check "Launch: Automatically" check in "Product > Scheme > Edit scheme > Run" menu.

When this setting wasn't checked I cannot find App icon in simulator to launch application.