挂载system
（rec）
csrutil disable
csrutil authenticated-root disable
sudo mkdir /Volumes/MountedSystem
sudo mount -o nobrowse -t apfs /dev/自己看系统分区 /Volumes/MountedSystem
禁止更新
(禁之前把rostetta下了)
sudo softwareupdate –install-rosetta
cd /Volumes/MountedSystem/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/
sudo chmod 644 SoftwareUpdateNotificationManager
sudo launchctl disable system/com.apple.softwareupdated
sudo launchctl disable system/com.apple.SoftwareUpdateNotificationManager
defaults delete com.apple.systempreferences AttentionPrefBundleIDs
defaults delete com.apple.systempreferences DidShowPrefBundleIDs
killall Dock
系统app目录
/system/applications
刷新启动快照
sudo bless –mount “/Volumes/MountedSystem/System/Library/CoreServices” –setBoot –create-snapshot