Error consolidating itunes library
In most cases, the content won't sync when the problem happens.
And you can try to restart your computer and your i OS device to fix this issue. You can continue solving the problem by using further solutions below.
Ease US Mobi Save supports the latest i OS version.
You can try to close the security software or change its setup to fix the issue.
If the error 54 occurs with content from the i Tunes Store, you can try to fix it by removing and then re-download the content.
Windows 10 users might encounter i Tunes sync error 54 with i OS devices due to some incorrect permission issues, wherein the i Tunes folder becomes 'Read Only'.
It will prevent your computer from syncing with the device you have connected to it.