XCode 11.1 is so buggy that I can't use it to update a Mac OS X application. It can't deal with a lot of UI objects in .xibs and it logs many, many errors.
I tried unsuccessfully to get it using time machine but it won't run. Is there somewhere I can get version 10.3?
Running my project with XCode 10.3 doesn't fix any of the problems I have. XCode still logs lots of errors like:
2019-10-22 16:39:44.764172-0600 Appname[10316:215611] [Nib Loading] Unknown class NSBoxCustom in Interface Builder file at path ...
and
2019-10-22 16:39:44.778901-0600 Appname[10316:215611] [framework] CoreUI: RunTimeThemeRefForBundleIdentifierAndName() couldn't find Assets.car in bundle with identifier: 'com.Appname'
So it looke like the problem is Catalina.