Cannot run application on simulator after installing Xcode 11 - CFBundleVersion error

Question

Yesterday, I\'ve downloaded beta version of Xcode 11. After that, I\'ve opened my project and tried to run with new Xcode. Unfortunately error has occurred with message:

Answer 1

Happened to me too, wasted almost an entire day scouting for possible causes.

The steps that finally fixed the problem and allowed me to install on simulator:

1. Quit Xcode and iOS Simulator
2. Remove /Library/Developer (the one from root), or rename it if you want to keep a backup
3. Relaunch Xcode, agree with the installation of command line tools
4. Continue work where you left over :)

Besides the steps mentioned in the question (fully uninstall Xcode 11, fully uninstall Xcode 10 and reinstall it afterwards), I also tried cloning the project in another location, circulating through all possible locations for derived data, installing other simulator runtimes and trying on those. None of them worked, luckily the console log app shown the path for the process that rejected the app bundle, it was one of the binaries installed by Xcode in /Library/Developer/PrivateFrameworks/CoreSimulator.framework.

Seems that Xcode 11 installed a newer version of the frameworks, and Xcode 10 was not overwriting them. Removing the whole /Library/Developer folder triggered the command line tools installation, which finally brought back the simulator runtime that properly worked in Xcode 10.

You gotta love the betas :)