Intel an Unexpected Error Occurred Try It Again
Some Mac users take run into an error when attempting to download or install system software updates that says "Installation failed, An error occurred while installing the selected updates." This alert comes upwardly in the Software Update arrangement preference panel, and has been encountered in macOS Big Sur, macOS Catalina, macOS Mojave, and prior versions too.
At that place are a diversity of reasons Mac users may come across the "installation failed" error when trying to download and install a particular MacOS software update, and nosotros'll get through some troubleshooting steps to help resolve the issue hither.
Troubleshooting macOS "Installation failed, An mistake occurred while installing the selected updates." Errors
We'll get through a diverseness of troubleshooting steps, as well equally offer an alternate solution to download macOS installers fifty-fifty if the System Preference panel for Software Update is repeatedly showing failure errors.
Await a flake
Users may encounter failures to download and install macOS updates when Apple tree servers are overloaded, therefore sometimes but waiting a bit can be helpful. This is specially relevant if the software update y'all are trying to install is brand new, like a major organization software release (this happened with Big Sur for example).
Reboot the Mac
Sometimes merely rebooting the Mac and trying once again can resolve the failed installation error.
Make sure the Mac is online and functionally connected to the internet
Some Mac users accept encountered the Installation Failed fault because their Mac has dropped an net connexion, or considering of a DNS issue.
In either case, make sure the Mac is online, and easy way to do this is by opening Safari and going to a not bad website similar https://osxdaily.com and make sure it loads and works as expected.
If you're having DNS problems, you lot may desire to cheque to see if custom DNS has been assault the Mac (or at the router level), or if your Internet service provider DNS servers are offline. If those proper name servers are non operation you may encounter various issues with downloading software updates, amid other problems. Using Google DNS 8.8.8.8 is a common DNS for many users, as is OpenDNS i.1.one.one.
Make Certain MacOS is Not Enrolled in Beta Updates
If you're trying to download a last version of MacOS just it'southward declining, you may still exist enrolled in the beta program. Some users have experienced this and institute that unenrolling from the beta updates resolves the Installation Failed error.
From the Software Update system preference panel, click on "Details" and choose "Restore Defaults" to unenroll from receiving Mac beta updates.
Effort downloading the macOS installers directly
This is more of a workaround, as it bypasses the Software Update system preference panel on the Mac, but you can try to download the macOS installer via App Store or direct download link from Apple tree, downloading the full macOS installer application direct using the control line, or by using the fantabulous free third party app MDS (Mac Deploy Stick).
If you go with the MDS route, download and install the application (information technology's gratis from the programmer TwoCanoes and can exist downloaded here), and then launch the MDS app and choose "Download MacOS" from the sidebar, selecting the version of macOS arrangement software you want to download and install.
One time you have the full installer of macOS, you should be able to launch information technology directly without experiencing the 'installation failed' error as yous see it only in Organization Preferences.
For what it's worth, this problem has been seen periodically over time with various macOS arrangement software versions.
It looks similar this in mod macOS 11 (Big Sur) and afterwards:
And information technology looks like this in macOS 10.15 (Catalina) and earlier:
Did one of the tips to a higher place resolve the "Installation failed, An mistake occurred while installing the selected updates." macOS error for y'all? Did you observe another solution? Share your experiences in the comments!
Source: https://osxdaily.com/2021/01/27/fix-macos-installation-failed-an-error-occurred-while-installing-the-selected-updates-errors/
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