In Xcode select the project's workspace in the sidebar, as shown in the figure below.
In the General section, in the Targets list as shown below, select the OTFMagicBox target and replace the placeholder bundle identifier with your own, which you registered in your Apple developer account.
Select Xcode from the top bar and navigate to Preferences in the dropdown menu.
A dialog box appears, navigate to the Accounts tab, click on the plus button, select Apple ID and press continue as shown in the figure below.
Enter the username and password of your developer account to log in.
After login, jump to Signing & Capabilities and enter your team and provisioning profile information.
Connect your mobile device to your Mac computer.
Select your device's name from the dropdown menu, and then you can run the application on the physical device.
