I used a mac at work where I created .ipa without problems and I tried my app on device.
Now at home (in another mac) when I choose device on my project and I do “build” I have an error:
Code Signing Identity ‘iPhone Developer
does not match any valid, non-expired, code-signing certificate in your keychain
why?
I had the same issue. You need to export your certificates and profiles from your mac at work, and import them at home. It is really annoying, you can just download the certificates and profiles to one mac, it wont work if you download then again onto another mac, after having them already used on another machine. If you are having issues exporting and importing profiles, then you can google for some tutorials.