I'm the author of a backup utility. In our testing with Mojave, we've discovered a handful of files, directories, and extended attributes that can't be read ... even by root.
Specifically,
Cannot read the following files:
/Library/Preferences/com.apple.TimeMachine.plist
/Users/amber/Library/Preferences/com.apple.AddressBook.plist
Cannot read the extended attributes of the following items:
/Library/Application Support/com.apple.TCC
/Users/amber/Library/Application Support/AddressBook
/Users/amber/Library/Calendars
/Users/amber/Library/Safari
/Users/amber/Library/Suggestions
/Users/amber/Library/PersonalizationPortrait
/Users/amber/Library/Cookies
In all cases, the error returned was 1 (EPERM, "Operation not permitted").
(a) Is the expected behavour for Mojave?
(b) Is this documented somewhere (I couldn't find any mention of this in the release notes)
(c) Is there a way around this?