Q: Hi..i just finish installed OS x maverick, it seems that my ITunes having problem..an error occured (-45054)...is there anybody can help me on this..thanks

Hi plugking,

Welcome to the Support Communities!

Repairing disk permissions is the first step in resolving this error message:

Troubleshooting permissions issues in Mac OS X

http://support.apple.com/kb/HT2963

Open Disk Utility (/Applications/Utilities/). Select your Mac OS X startup volume in the column on the left of the Disk Utility window, then click the First Aid tab. Click the Repair Disk Permissions

Also, make sure you have the latest version of iTunes installed:

Apple - iTunes - Download iTunes Now

http://www.apple.com/itunes/download/

Cheers,

- Judy