I try to run a HelloWorld project into my client device, the application identifier in Xcode is: com.domainname.HelloWorld, and when i created the provisioning profile, in the AppID, i have putted: com.domainname.helloworld (lower case).
Now, in Xcode, i try to assign the code signing identity to the provisioning profile i have created, however, in the drop list, i can see the provisioning profile but i can’t select it.

I am following this tutorial and i have doubt i didn’t knew how to Don’t forget to add the new provisioning profile to XCode as well.
Can you please help me there? thanx in advance.
BundleIds are case-sensitive.
Make sure you call it
com.domainname.HelloWorldin your Info.plist.From Apple Documentation: