iTunes unknown error occurred on Macbook Pro Retina 45054
An unknown error message Occurred (-45054) on iTunes? - Easy Fix!
The error message 45054 on iTunes OCCURS files corrupted due to incomplete or iTunes installation. It usually we OCCURS after upgrading your iTunes. But you don 't have to worry, It can be Easily fixed by clicking one button. Here we are sharing esta how to solve issue.
Go to Step 01. APPLICATION -> UTILITIES -> DISK UTILITY
Step 02. Select YOUR HARD DRIVE and then a Click REPAIR DISK PERMISSIONS.
Step 03. Launch iTunes and check if the error message still Appears 45054.