So this has happened multiple times now, and it's very strange. But it's such a minor inconsequential thing. Every single time I clone a drive with SuperDuper! I can no longer edit the Safari preferences on the new cloned drive. For example, I cannot change the home page. It just refuses to change. I read online you can correct this by deleting the plist preferences file, but sometimes the file is not even there. Safari works fine otherwise. This seems rather drastic, but each time I've simply just gone into recovery mode and reinstalled the OS. Fortunately, on SSD machines, it goes quickly, and the data is preserved too. Then after that, no issues. Is this a permissions thing? If so, how to correct it? I note that there is no way to fix permissions in Disk Utility anymore. Is it a problem with SuperDuper!? I am running the latest version. Would Carbon Copy Cloner work better?