Same problem here: invalid certificate error after updating Xcode. Also, I'm a relatively new Apple user (needed to buy one because Apple doesn't allow other platforms to compile iOS apps...) and I would be grateful if someone can explain me how forums work in the Apple universe. What i'm used to in regard to support forums is that someone posts a problem and then others post solutions. This forum, however, all seems to be about one person posting a problem and then many others posting confirmations that they also have the problem - i never find a solution here to iOS/Apple-related problems i have (the closest thing to a solution that i've seen here is the occassional "oh you have to email support"). Wth is this.

Same here. This is the first apple product i own in my life and it feels like it's thrown me back to the 1990s. Installs that take hours, uninstalls that take minutes, no progress indicators, no information about why the install fails, inexplicable infinite loops that cannot be broken, .... what is this??