You generate a provisioning profile in the Apple Developer Portal to ensure that you can install and run the app for testing and distribution. When you create a provisioning profile, you link the information about the app, the team that created the app, and the distribution method, and then store that information in the app bundle.

1. Go to https://developer.apple.com, and then sign in to your Apple Developer Portal account.
2. On your account dashboard, click Certificates, Identifiers & Profiles.
3. On the Certificates, Identifiers & Profiles page, in the category list on the left side of the screen, click Profiles.
4. In the Profiles section, add a new profile by clicking the plus icon.
5. In the Register a New Provisioning Profile section, choose the profile type that you want to use for your app:
   • To create a provisioning profile to use during app development, click iOS App Development.
   • To create a provisioning profile to use to distribute and install the app on a limited number of registered devices, click Ad Hoc.
   • To create a provisioning profile to use to distribute and submit the app to the App Store, click App Store.
   • To create a provisioning profile to use to distribute the app for use within your organization, click In House.
6. Click Continue.
7. In the Generate a Provisioning Profile section, from the App ID list, select the App ID that you want to use with your profile.
8. Click Continue.
9. In the Select Certificates section, choose the signing certificate that you want to use with your profile:
   • For a development provisioning profile, select the checkboxes next to the development signing certificates that you want to use.
     Note: For scenarios in which multiple developers work on the app, you can add multiple development signing certificates to a development provisioning profile. You can also debug mobile apps that have a development provisioning profile by using Safari Web Inspector.
   • For a distribution provisioning profile, click the distribution signing certificate that you want to use.
10. Click Continue.
11. If you created a development provisioning profile, in the Select Devices section, select the checkboxes next to the registered devices that you want to use for the development of your app, and then click Continue.
12. In the Review, Name and Generate section, in the Provisioning Profile Name, enter the name for your provisioning profile.
13. Click Generate.
14. In the Download and Install section, click Download, and then save the .mobileprovision file with your profile on your hard drive.