MacOS – How to Fix iTunes Error -45076

high sierraitunesmacos

macOS UpDate to High Sierra. iTunes can't open.

What is iTunes error -45076, and how might one fix the problem? I have already searched Apple and AskDifferent for the specific error code, but come up empty handed.

  • macOS High Sierra was install on Sept 26, 2017.
  • iTunes 12.6.2

iTunes starts, displays the error, as shown below, and leaves no option but to quit. It tried before and after the High Sierra update: iTunes was working before the High Sierra update today.

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Starting iTunes from a terminal (/Applications/iTunes.app/Contents/MacOS/iTunes)
yields the following output: 2017-09-26 22:09:09.802 iTunes[930:14353] .sdef warning for attribute 'rawData' of class 'artwork' in suite 'iTunes Suite': 'raw data' is not a valid type name.

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Best Answer

Here's how to fix error -45076 if you have downgraded iTunes 12.7 to 12.6.2 still under Sierra and have then upgraded your OS to High Sierra:

  1. Re-download the iTunes 12.6.2-DMG directly from the Apple Servers.
  2. Make a backup of ~/Music/iTunes/iTunes Library.itl (just in case).
  3. Delete iTunes 12.6.2 from your High Sierra Mac, this time entirely (list of ingredients courtesy of macrumours.com member driveparty):
    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 again from the DMG downloaded above.
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