How to change the bundle identifier of an app in Xcode 5?

Xcode 5 won't let me change the bundle identifier. The app name portion after com.mycompany. is greyed out.

I created a bundle identifier in ITC which slightly differs and I want to use this new bundle identifier.

Do I have to create a new Xcode project with the correct identifier?

Actually this is pretty simple:

1. Select your target
2. Select 'info' tab (you can do the same by finding the plist file on the project)
3. Search for "Bundle Identifier" key, The value on your end should be com.mycompany.${PRODUCT_NAME:rfc1034identifier}.

If you want to change the grey field just replace the "com.mycompany" with whatever you want. the other field is the "Product Name" (which is read dynamically from the relevant key), You can change it by set the "Product Name" key on "Build Settings". You can also do it pretty ugly and change all the bundle identifier to whatever you want but I don't recommend that because if you would add more targets it would be static and harder to maintain.

1. Select your target under the Targets section.
2. Go to the Build Settings tab.
3. Scroll down to Packaging.
4. Change the Product Name to the desired one.

In Xcode 5.1.1, you can do it by simply renaming your Target. Double-click on the Target name to change it.

In your projects Info.plist(or in Info tab of project setiings, which is the same) change ${PRODUCT_NAME:rfc1034identifier} to desired name. After that it wouldn't be greyed out.