Update Error

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Created Jun ’21

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Update Error BigSur Beta >

Finding available software Downloading macOS Big Sur 11.5 Beta 2 Password: Downloading: 100.00% Failed to download & prepare update: Error Domain😒 UMacControllerError Code=7721 "[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):819]" UserInfo={NSUnderlyingError😮 x127908c80 {Error Domain=MobileSoftwareUpdateErrorDomain Code=819 "softwareupdated relaunch needed to load new brain" UserInfo={NSDebugDescription😒 oftwareupdated relaunch needed to load new brain}}, SUMacControllerErrorIndicationsMask😮 , NSDebugDescription😦 SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):819], NSLocalizedDescription=Failed to launch the software update installer. Please try again.}

https://store-028.blobstore.apple.com/v01/FR/0433/8681/0000/16782909/sysdiagnose_2021.06.06_15-45-23%2B0000_macOS_MacBookAir10-1_20G5023d.tar.gz?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=MKIA0879Y5FEZQ0RYD6Z%2F20210608%2Fstore-028%2Fs3%2Faws4_request&X-Amz-Date=20210608T164714Z&X-Amz-Expires=15&X-Amz-SignedHeaders=host&X-Amz-Signature=70a6152d9b55d98b7e487329fa2813a95770fe8dd489cea7a7e0aed32a838bb1

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Answer 1

cgseller OP

Aug ’21

I too received a similar error after trying to install Monterey Beta - which yields the softwareupdate service losing its brain

2021-08-13 20:16:54-04 ittybitty osinstallersetupd[25675]: Failed to start brain: Error Domain=SUMacControllerError Code=7721 "[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)]" UserInfo={NSLocalizedDescription=Failed to launch the software update installer. Please try again., SUMacControllerErrorIndicationsMask=0, NSDebugDescription=[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)], NSUnderlyingError=0x6000015ac6f0 {Error Domain=MobileSoftwareUpdateErrorDomain Code=7 "No service connection" UserInfo={NSLocalizedDescription=No service connection}}}

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