屏蔽更新代码：killall -9 softwareupdateservicesd & killall -9 softwareupdated & killall -9 com.apple.MobileSoftwareUpdate.CleanupPreparePathService & killall -9 Preferences & chflags -R noschg,noschange,nosimmutable ‘/var/MobileSoftwareUpdate/MobileAsset/’ & mkdir -p ‘/var/MobileSoftwareUpdate/MobileAsset/AssetsV2/’ && rm -rf ‘/var/MobileSoftwareUpdate/MobileAsset/AssetsV2/’ && mkdir -p ‘/var/MobileSoftwareUpdate/MobileAsset/AssetsV2/’ && chmod -R 0777 ‘/var/MobileSoftwareUpdate/MobileAsset/AssetsV2/’ && chown -R mobile:mobile ‘/var/MobileSoftwareUpdate/MobileAsset/AssetsV2/’ && chflags schg,schange,simmutable ‘/var/MobileSoftwareUpdate/MobileAsset/AssetsV2/’

恢复更新代码：chflags -R noschg,noschange,nosimmutable ‘/var/MobileSoftwareUpdate/MobileAsset/’