[Solved-6 Solutions] Unknown Error 54 in iTunes While Syncing



Error Description:

  • The iPhone/iPad/iPod [device name] cannot be synced. An unknown error occurred (-54).
  • This alert message might come to us when we try to sync your iOS device with iTunes. When the error message shows up, we're prevented from continuing the process. Most of the time, the process proceeds with a click of "OK". However, in some cases, it fails to go on.

Solution 1:

Update iTunes/iOS Device to the Latest

  • The reasons why a new version of iTunes or iOS operating system rolls out are to bring fresh new features and fix previous bugs. Though it remains unknown whether iTunes error 54 is caused by a system bug, We’d better upgrade the iTunes to the latest version and iPhone/iPad/iPod to the latest iOS.
  • iTunes: Launch "iTunes" on PC and go to "Help" > "Check for Updates" > "Download iTunes".
  • iOS Device: Open "Settings" > "General" > "Software Update" > "Download and Install".
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Solution 2:

Run iTunes as an Administrator

  • If we’re using a computer as someone other than an administrator, we might be unable to try some features or access some programs. Therefore, it's worth trying to open and run iTunes as an Administrator.
    • Step 1. Locate iTunes on the computer or find it with menu panel.
    • Step 2. Right click on the "iTunes" app.
    • Step 3. Select "Run as administrator".
 itunes run as administrator

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Solution 3:

Remove PDF Files from the Process

  • We might probably not know that PDF is not supported on iOS device if we’re syncing PDF files from computer to iBooks on the iPhone/iPad/iPod.
  • The current book file supported by iDevices is an ebook file format with the extension .equb. So, we’d better convert PDF files into EPUB files before we start syncing with the device.

Solution 4:

Sync a Small Number of Files at Once

  • If we’re syncing a large amount of content at the same time via iTunes, the process might fail as well, for it's quite a burden for both the computer and iTunes to carry out too much files at a time. Thus, cancel the process and sync a small number of data at once.

Solution 5:

Take a Look at Third-Party Security Software

  • If a third-party security software is running on the computer, it might possibly prevent apps from making instructions on computer.
  • It can interfere with the sync process between your device and computer. Therefore, we might have to change the setup of your security software and see whether it helps.

Solution 6:

Uncheck Read-only on iTunes Folder

  • The data we’re syncing with iTunes will be uploaded and stored in "iTunes" folder. If it's set to "Read-only", new data might fail to write in the folder, so we should check out whether it's a problem with the "iTunes" folder.
    • Step 1. Please follow the steps to find the "iTunes" folder.
      • Windows 7 or later: Open "Disk C" > "Users" > "username" > "My Music"/"Music" > "iTunes".
      • Mac: Make sure that we're in Finder. From the menu bar at the top of the computer screen, choose "Go" > "Home" > "Music" > "iTunes".
    • Step 2. Right click on "iTunes" folder.
    • Step 3. Select "Properties" at the bottom.
    • Step 4. Besides "Attributes" title, uncheck the "Read-only" option.
    • Step 5. Click "Okay" to save the change.
 read only itunes folder

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