Very rarely, a macOS High Sierra installation fails and remains stuck on a black screen, or all white screen. macOS High Sierra Installation Freezes, Stuck on Black or White Screen Sometimes a reboot can be sufficient to remedy this error as well. Troubleshooting this issue usually involves multiple easy steps: confirming the Mac has active reliable internet access, and then trying to install macOS High Sierra again. That content can’t be downloaded at this time. Installation requires downloading important content. Some Mac users are encountering an installation error stating “Installation of macOS could not continue. “Installation of macOS could not continue” error You can check the compatibility list for Macs that support macOS High Sierra here, generally speaking if the Mac runs Sierra and is reasonably modern, it should work. If macOS High Sierra will not proceed with installation on the Mac, usually with a notification along the lines of “macOS High Sierra cannot be installed”, it is likely because the Mac is not compatible with High Sierra. MacOS High Sierra cannot be installed, or refuses to install on a Mac This should resolve most issues with failed installation attempts. Reboot the Mac, then attempt to re-install Mac OS High Sierra using the “Install macOS High Sierra.app” app again. If you get package missing errors or damaged application errors, delete the “Install macOS High Sierra.app” from the /Applications/ folder on the Mac, then re-download the installer from the Mac App Store. Quit the installer to restart your computer and try again.” Quit the installer to restart your computer and try again.” or, rarely, more obscure error messages with “macOS could not be installed on your computer” or “An error occurred while verifying firmware. There are various error messages that may be seen in this including: “The path /System/Installation/Packages/OSInstall.mpkg appears to be missing or damaged. If installation fails, usually in a very obvious manner with an error message when attempting to install the High Sierra update, the solution is usually to redownload the installer and then reinstall macOS High Sierra. This prevents the user from creating a USB installer for MacOS High Sierra.Ī workaround for this issue is to use a third party tool to download the complete macOS High Sierra installer as discussed here. Some users report they are unable to download the complete macOS High Sierra installer app, and instead wind up with a small 20mb version that attempts to download the remainder of the installer during the installation itself. MacOS High Sierra Installer is Incomplete or Unable to Make a USB Drive Rarely, you may need to reboot the Mac as well – this should not be necessary however.
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