Вышла версия cmake 3.9.2. А в Changelog'е написано про сабжевый баг:
* On macOS, the default application bundle ``Info.plist`` file no longer
  enables Hi-DPI support as it did in 3.9.0 and 3.9.1.  The change had
  to be reverted because it broke iOS applications.
* The Xcode generator no longer adds "outputPaths" to custom script
  build phases as it did in 3.9.0 and 3.9.1.  This was added in an
  attempt to support Xcode 9's new build system, but broke incremental
  rebuilds for both the old and new Xcode build systems.






