The latest installer by TeeZee failed, I deleted the boot file and restarted the installer which solved this problem on previous versions but it failed again.
I have tried posting the output from console but the code feature has gone and it's too many characters
Hoping this is enough to shine some light on the issue?
Aug 19 16:07:59 Christophers-Macbook-Pro.local installd[3197]: PackageKit: allow user idle system sleep
Aug 19 16:07:59 Christophers-Macbook-Pro.local installd[3197]: PackageKit: Install Failed: Error Domain=PKInstallErrorDomain Code=121 "An error occurred while updating system extension information." UserInfo=0x7f90016435d0 {NSUnderlyingError=0x7f900165a200 "The operation couldn’t be completed. (kextcache error 71.)", NSLocalizedDescription=An error occurred while updating system extension information., arguments=(
"-update-volume",
"/",
"-Installer"
)} {
NSLocalizedDescription = "An error occurred while updating system extension information.";
NSUnderlyingError = "Error Domain=kextcache Code=71 \"The operation couldn\U2019t be completed. (kextcache error 71.)\"";
arguments = (
"-update-volume",
"/",
"-Installer"
);
}
Aug 19 16:07:59 Christophers-Macbook-Pro.local Installer[3153]: install:didFailWithError:Error Domain=PKInstallErrorDomain Code=121 "An error occurred while updating system extension information." UserInfo=0x7f8182889a30 {arguments=(
"-update-volume",
"/",
"-Installer"
), NSLocalizedDescription=An error occurred while updating system extension information., NSUnderlyingError=0x7f81828917c0 "The operation couldn’t be completed. (kextcache error 71.)"}
Aug 19 16:07:59 Christophers-Macbook-Pro.local Installer[3153]: Install failed: The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.
Aug 19 16:08:00 Christophers-Macbook-Pro.local Installer[3153]: IFDInstallController 82BE6BE0 state = 7
Aug 19 16:08:00 Christophers-Macbook-Pro.local Installer[3153]: Displaying 'Install Failed' UI.
Aug 19 16:08:00 Christophers-Macbook-Pro.local Installer[3153]: 'Install Failed' UI displayed message:'The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.'.
Aug 19 16:12:35 Christophers-Macbook-Pro.local installd[3197]: installd: Exiting.