Well, as for ICU it isn´t supported in Mavericks and only crashes if you try to transfer an app onto your device. Its the same story all over the net… According to Apple you have to use the Apple configurator as ICU is no longer supported. But that is fine, both Apple Configurator and Xcode runs well (except for the app transfer).
I am using a developer profile and trying to test the app on an actual device. It worked before, so I don´t really know what happened. I know that my cert expired in november, but it has been renewed. Its a new app as well, so all files are newly downloaded.
The only thing I could think of was that it was some old file residing somewhere. I deleted all other certs, but it didm´t help. As for the ICU list of certs (that appear in Corona Builder), I was able to get it via Xcode and download it directly from Apple. There seems to be two entries for each app of which the newest start with “IOS Team Provisioning Profile: com.mycompany.myapp”. The other one is just listed as “Myapp” (which is the name I chose).
Using either provisioning profile to compile gives the same result: “No code signature found”.
Ok I found the problem: My developer profile was duplicated for some reason. It did not show up in the keychain if I presser “Certificates” so it was´t so apparent… I managed to search for all certificates containing my name and voilá - my expired developer certificate shows up as well.
After deleting that, everything works fine.