Normally it’s only possible to sync media on an iPod with one computer. If you try to use a second computer you get the warning below that “the iPod is synced with another iTunes library. Do you want to erase this iPod and sync with this iTunes library”?
However, I’ve found an easy fix for this on net somewhere.
Steps are identical for both PC & MAC.
Find iTunes folder in your “My Music” (XP) or “Music” (Vista) directory. On the Mac it is in your Music directory.
* For the editing part, I recommend UltraEdit on the PC and a combination of TextExit / HexEdit on the Mac. Any hex editor will do, and you only need to edit files on the second machine.
* I recommend you do not attempt to normal sync the same types of data on both machines.
Backup Your Library
On the machine you want to sync with, backup “iTunes Music Library.xml” and “iTunes Music Library” (Tunes Music Library.itl on PC) to a safe location. These are the files you will be modifying.
1) Find your iTunes Library ID
On the machine your iPod currently syncs with, open “iTunes Music Library.xml” with a text editor and find the entry between the tags, after “Library Persistent ID”. Copy this entry and close this file.
2) Change your Library ID
iTunes stores your library information in two places. An XML file and a binary file. You now need to change the ID in both so they match your other library.
Make sure iTunes is not running.
On the machine you want to sync with open “iTunes Music Library.xml” in a text editor. Again, find the entry between the tags after “Library Persistent ID” and copy this entry exactly. This time you can use the clipboard if you wish.
When you have a copy, replace this entry with the one you copied in part 1. Make sure you do not change anything else, and the length of the entry is 16 characters/digits. Save this file and close it.
In the Hex Editor, open “iTunes Music Library” (Tunes Music Library.itl on PC).
Select “Find and Replace” from the Edit menu. Make sure “Hex” matching is selected (not ASCII). In “Find” enter the ID you took a note of in Part 1. In Replace, enter the ID you copied at the start of Part 2. Choose Replace All, there should be one match.
Save this file and close it.
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