Noticed that System Preferences app has changed. Old 3rd party prefPanes are now being loaded by some LegacyLoader service. Is there any details about that?
System Preferences LegacyLoader.xpc
Same here.
No info on that online...
No real info, but in order to debug a prefPane now, you need to connect to:
/System/Library/Frameworks/PreferencePanes.framework/Versions/A/XPCServices/legacyLoader.xpc/Contents/MacOS/legacyLoaderexcept you'll have to disable SIP to do so. In the past you could debug while running in a self-signed copy of System Preferences, but even if you self-sign legacyLoader, there is no way to tell System Preferences to use your self-signed copy.
I wish they would fix this. I am delaying the purchase of a 16" McBook Pro because I would be forced to run Catalina and have no way to debug without disabling SIP system-wide.