Error Message “The package InstallAssistant.pkg fails to meet GateKeeper policy” when upgrading MacOS
Issue
When upgrading MacOS, your receive the following message
The package InstallAssistant.pkg fails to meet GateKeeper policy
Possible Solutions
Uninstall 3rd party apps
This is the one that worked for me. I had Parallels installed.
Uninstall applications like the following ones and try again.
- Zoom
- Parallels
- Microsoft Office
Disable GateKeeper
Not my favorite option.
Disable before upgrading and re-enabled after.
Open Terminal app
Run this command to disable Gatekeeper
sudo spctl --master-disable
Run this command to check if Gatekeeper is disabled
spctl --status
Run this command to enable Gatekeeper
sudo spctl --master-enable
Upgrade from a USB Installation Disk
Create a USB installer with the latest MacOS release and boot it.
Sources
https://osxdaily.com/2015/05/04/disable-gatekeeper-command-line-mac-osx/
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