/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice
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Finderで「移動」→「フォルダへ移動...」で下記を入れて「移動」
/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A
/Volumes/TimeMachine/Backups.backupdb/***/***/Macintosh HD/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A
(***のところは環境に合わせて書き換え←TimeMachineのHDを開いて確認)
Mac側の「MobileDevice」を「MobileDevice_」などとリネームしてバックアップして、
TimeMachineの方の同名ファイルをMac側にドラッグ&ドロップ
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https://developer.apple.com/download/more/
#Yosemiteにインストール可能なのはVer6.3 - 7.2
#下記でバージョンチェック
https://en.wikipedia.org/wiki/Xcode
2) 下記にMobileDeviceがインストールされる
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A
Replace
/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice
It works.
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Finder - Go - Go to the folder...
/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A
Backup:
/Volumes/TimeMachine/Backups.backupdb/***/***/Macintosh HD/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A
#You must rewrite the *** according to your environment (see your TimeMachine hard drive)
You can see the file 'MobileDevice' in both folder.
#You should back up your original file before replace.
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if you don't have backup, try this.
1) Download and Install 'Xcode'
https://developer.apple.com/download/more/
#Require ID (free registration)
#check this ;
https://en.wikipedia.org/wiki/Xcode
2) You can find the file 'MobileDevice' at
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A