I want to know how I can change the default prefix so that when I
create new targets their bundle identifier will default to
'org.brautaset.X' instead of 'com.yourcompany.X'.
The answer is to go to /Library/Application Support/Apple/Developer
Tools/Target Templates/*/ and open the .trgttmpl files in a text
editor (Xcode won't open them). In each target template there is a
line like
CFBundleIdentifier = "com.yourcompany.«TARGETNAMEASXML»";
When the template is instantiated the «TARGETNAMEASXML» is replaced
with the target name. You can change the com.yourcompany to
org.brautaset here.
You can create your own templates and put them in ~/Library/
Application Support/Apple/Developer Tools/Target Templates for your
own use.