I have been getting: "Installation failed. In order to continue installing, you need to be an owner." So, I use: sudo softwareupdate -i -a -R Now I have this error: Failed to download & prepare update: Error Domain=SUOSUErrorDomain Code=201 "Failed to personalize the software update. Please try again." UserInfo={NSLocalizedRecoverySuggestion=An error occurred while downloading the selected updates. Please check your internet connection and try again., NSLocalizedDescription=Failed to personalize the software update. Please try again., NSUnderlyingError=0x6000012c0210 {Error Domain=SUMacControllerError Code=7723 "[SUMacControllerErrorPreflightPersonalizeFailed=7723] Failed to perform PreflightPersonalize operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_PERSONALIZATION_FAILURE(2)_1_PersonalizationErrorDomain(Personalization):kAMAuthInstallTATSUDeclinedAuthorization(3194)|TATSUDeclinedAuthorization|]" UserInfo={SUMacControllerErrorIndicationsSummary=|TATSUDeclinedAuthorization|, SUMacControllerErrorIndicationsMask=16, NSUnderlyingError=0x6000012c0780 {Error Domain=MobileSoftwareUpdateErrorDomain Code=2 "Could not personalize boot/firmware bundle." UserInfo={NSUnderlyingError=0x6000012c07b0 {Error Domain=PersonalizationErrorDomain Code=3194 "AMAuthInstallBundlePersonalize() failed: Declined to authorize this image on this device for this user." UserInfo=0x6000009cc5c0 (not displayed)}, NSLocalizedDescription=Could not personalize boot/firmware bundle., target_update=21A5294g}}, NSLocalizedDescription=Failed to personalize the software update. Please try again., NSDebugDescription=[SUMacControllerErrorPreflightPersonalizeFailed=7723] Failed to perform PreflightPersonalize operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_PERSONALIZATION_FAILURE(2)_1_PersonalizationErrorDomain(Personalization):kAMAuthInstallTATSUDeclinedAuthorization(3194)|TATSUDeclinedAuthorization|], SUMacControllerErrorIndicationsDescription=-> TATSU declined to authorize this user for this install.}}} Any thoughts would be appreciated.