An anonymous reader shares a report: The 10.13.4 update for macOS High Sierra is recommended for all users, and was emitted at the end of March promising to “improve stability, performance, and security of your Mac.” But geek support sites have started filling up with people complaining that it had the opposite effect: killing their computer with messages that “the macOS installation couldn’t be completed.” The initial install appears to be working fine, but when users go to shutdown or reboot an upgraded system, it goes into recovery mode. According to numerous reports, there doesn’t appear to be anything wrong with users’ Macs — internal drives report that they’re fine. And the issue is affecting a range of different Apple-branded computers from different years. Some have been successful in getting 10.13.4 to install by launching from Safe Mode, but others haven’t and are deciding to roll back and stick with 10.13.3 until Apple puts out a new update that will fix whatever the issue is while claiming it has nothing to do with it.
of this story at Slashdot.