MacOS 10.13.4 Update Failed to Complete? Mac Wont Boot? Troubleshooting Update Failures

MacOS 10.13.4 Update Failed to Complete? Mac Wont Boot? Troubleshooting Update Failures

Some Mac users have reported installation failures when trying to install , usually seeing an error about the installation not being able to complete. Sometimes the installer freezes after many hours of being stuck, or sometimes the update seems to install but the Mac refuses to boot as usual afterwards. If you have encountered an error or a failure when trying to update macOS 10.13.4 system software, you may be able to easily correct the problem by running through the troubleshooting steps detailed below. Were going to focus on two main approaches; running the update again (if its a general failure upon attempting to install from the App Store) or by trying to install macOS 10.13.4 with the macOS High Sierra 10.13.4 Combo Update package instead of through the Mac App Store, or simply choosing to reinstall macOS system software. Before beginning any of these troubleshooting steps you should have a complete backup made of the Mac. Ideally youd have made a backup before installing the system software update to begin with, which then allows you to roll back to that prior backup in the event neither of the following approaches work to resolve the problem. If installation fails but the Mac is still usable as normal, try running the 10.13.4 Combo Update: The Combo Update can be installed directly atop a prior macOS 10.13.x version. is pretty straight forward process, similar to running any other application installer. The Mac will reboot when updating has completed. If the Mac will not boot, you may need to reinstall Mac OS through Recovery Mode: Reinstalling macOS will just install a new copy of system software, it should not change any user files, applications, or data aside from system software. Nonetheless its critical to have a backup of your data available just in case something goes haywire. is a tried and true troubleshooting approach for situations where the system software will not function as intended or wont boot at all. If all else fails, you can try to a date prior to installing 10.13.4, assuming you made one anyway (one of the many reasons regular backups are so important!). Installation failures and software update failures should drive home the importance of always backing up a computer, particularly before installing any system software update, security update, or other software. After macOS High Sierra 10.13.4 successfully installs, you can , but dont forget to backup before beginning that process either. Did these tricks work to resolve your problems installing macOS 10.13.4? Let us know in the comments below if these approaches worked for you, or if you found another solution.