Updated iTunes in 10.12.6 from 12.6.2 to 12.7 Booted from another volume, deleted 12.7, booted back and installed 12.6.2 All ok. Then updated to 10.13, then got error 45076

iTunes 12.6.2 is installed by default with 10.13, in a fresh installation of 10.13: iTunes 12.6.2 -> no error

This is right 👌 Downgrade To iTunes 12.6.2

1.turn off 「 MAC SIP 」

2.Mac restart

3.terminal code - need Add 「 sudo 」 Frist

sudo rm -rf /Library/Documentation/Applications/iTunes/Acknowledgements.rtf /Library/Documentation/iPod/Acknowledgements.rtf /Library/Frameworks/iTunesLibrary.framework/ /Applications/iTunes.app/ /System/Library/PrivateFrameworks/iTunesAccess.framework/ /System/Library/LaunchDaemons/com.apple.fpsd.plist /System/Library/PrivateFrameworks/CoreFP.framework/ /System/Library/PrivateFrameworks/CoreADI.framework/ /System/Library/LaunchDaemons/com.apple.adid.plist /System/Library/CoreServices/UAUPlugins/ADIUserAccountUpdater.bundle/ /System/Library/CoreServices/CoreTypes.bundle/Contents/Library/MobileDevices.bundle/ /System/Library/LaunchDaemons/com.apple.usbmuxd.plist /System/Library/PrivateFrameworks/AirTrafficHost.framework/ /System/Library/PrivateFrameworks/DeviceLink.framework/ /System/Library/PrivateFrameworks/MobileDevice.framework/ /System/Library/Extensions/AppleMobileDevice.kext/ /System/Library/Extensions/AppleUsbEthernetHost

4.install iTunes 12.6.2 & restore Your backup file 「 iTunes Library.itl 」

5.turn on 「 MAC SIP 」

6.Disable iTunes update - terminal code

sudo softwareupdate --ignore iTunesXPatch

ps:

https://apple.stackexchange.com/questions/299842/how-to-fix-itunes-error-45076

https://forums.macrumors.com/threads/can-you-downgrade-itunes-to-earlier-than-12-7-in-high-sierra.2068491/#post-25071981

通用 降级 使用 iTunes 12.6.2 方法