Mac utility app SuperDuper! will no longer always fail to make a bootable backup because of a bug in macOS Sequoia but Apple's fix doesn't remove all problems.SuperDuper! app icon amidst hard drives and a Mac keyboardThe newly-released macOS Sequoia 15.3 has corrected a problem that saw the SuperDuper! backup utility fail at particular step in making a bootable copy of a drive. Developer Dave Nanian reported in December 2024 that the then-new macOS 15.2 had changed a feature called the Replicator.Nanian thought the change might have been accidental, but whatever the cause, it was causing his app and presumably other backup utilities to fail. "Towards the end of replicating the Data volume," he wrote at the time, "seemingly when it's about to copy either Preboot or Recovery, it fails with a Resource Busy error." Continue Reading on AppleInsider | Discuss on our Forums