While the copies are fine, the error was, at the very least, disconcerting. Unfortunately, 10.13.4 broke compatibility with earlier major macOS versions of update_dyld_shared_cache, causing the tool to crash on launch. Setting up a drive for boot involves running the appropriate system tools, from that OS version, so that things are configured as the older OS expects them to be. SuperDuper! 3.1.5 Beta 1 Download Replacing Gaskets The beta resolves these problems (among others), and adds the ability to multi-select schedules in the Scheduled Copies window and run them all with one click. If you’re using it, and you’re getting errors, you’ll have to turn that feature off until they fix their bug.Ĭhanges in macOS 10.13.4's behavior caused some problems for scheduling, and for the final steps involved in preparing an earlier major OS version's copy for boot. At least in its current release, Sophos’ Anti-Ransomware feature fails at that task. One of the fundamental jobs of an antivirus tool is to not break basic system functionality while doing its thing. My guess is that it’s actively scanning the Preboot volume that bless has mounted in order to properly set up things for boot, and thus vetoes the ejection of that volume when bless tries to eject it. This is just another example of Antivirus programs trying to “help” but, in the end, making a system less reliable in an obscure, confusing way. The problem is that Sophos’ “Anti-Ransomware” module is preventing macOS’s bless tool from working. | 05:21:41 PM | Error | /sbin/umount returned non-0 exit status | 05:21:41 PM | Error | umount(/private/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/bless.5cmA): Resource busy - try 'diskutil unmount' But, if you’re using Sophos Antivirus and are seeing the error This isn’t the first time Antivirus programs have caused problems for us, and it won’t be the last.
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