o It looks like Installer.app in macOS Catalina introduced a new bug when using Installer plugins.
The - (BOOL) shouldLoad; method of the InstallerSection class is not called anymore.
This is rather annoying since this means that steps that should not be displayed will be displayed in Installer.app.
o It looks like Installer.app likes to log errors that do not exist.
For instance, it emjoys reporting in install.log that it could not load OPTIONAL resources such as readme or license documents.
Could it be possible for Installer.app to stop polluting install.log with this fake issues?
Installer[1176]: Failed to load specified background image
Installer[1176]: Could not load resource readme: (null)
Installer[1176]: Could not load resource license: (null)
Basically, it would be a good idea to spend some time performing QA on Installer.app before releasing macOS Catalina.