After working on this problem for three hours, I managed to get iTunes 10.7 installed
By combining suggestions from all over, the place (thanks everyone!,) this combination worked for me
Uninstalling and Reinstalling ITunes
iTunes Store
12/3/12 7:23 AM
Step 1:
· Launch iTunes.
· Click “File” and select “Export Library” to save your iTunes library if necessary.
· Quit iTunes when you have finished exporting the library.
Step 2:
· Click “Finder” and select “Applications” from the left sidebar.
· Drag and drop the “iTunes” icon from the “Applications” folder to the “Trash” icon in your dock or on your desktop.
Step 3:
· Click “Go” in the “Finder” menu and select “Utilities.”
· Double-click “Activity Monitor,” select “iTunes Helper” and then click “Quit Process.”
Step 4:
· Click the “Apple” menu and select “System Preferences.”
· Click “Accounts” and then click the “Login Items” tab.
· Click the “iTunes Helper” entry and then click the subtraction sign to remove it from the auto-start list.
Step 5:
· Restart your computer.
· After your Mac has restarted, right-click the “Trash” icon in your dock or on your desktop and select “Empty Trash.”
Step 6:
· Click “Finder,” select “Go” and then “Go to Folder.”
· Enter “~/Library/” in the text box and press “Enter.”
· Drag and drop the “iTunes” folder to the “Trash” icon.
Step 7:
· Double-click the “Preferences” folder and delete all files beginning with “com.apple.iTunes” by dragging and dropping those files to the Trash.
Step 8:
· Double-click the “ByHost” folder and delete all files beginning with “com.apple.iTunes” by dragging and dropping those files to the Trash.
Step 9:
· Right-click “Trash” and select “Empty Trash.”
Step 10:
I got v.10.7 from another place (http://support.apple.com/downloads/#itunes.)
Step 11:
· Download the version of iTunes you want to install on your Mac.
Step 12:
· Open your “Downloads” folder and double-click the iTunes installation file to install an old version of iTunes.
Step 13:
· Launch iTunes after installation is complete.
· Click “File” and select “Import.”
· Select the iTunes library file you exported previously to restore your iTunes library.
If this happens...
An unknown error occurred (–42408)
Remove the SC Info folder
If you are still unable to authorize your computer to play your purchases, you may be able to resolve your issue by removing the "SC Info" folder.
To do so, follow these steps:
Mac OS X
1. Quit iTunes and any other open applications until only Finder is open.
2. Choose Go > Go to Folder.
3. Type /Users/Shared/SC Info and click Go.
4. If Finder is not already set to column view, set it by choosing View > as Columns.
5. Select the SC Info folder and move it to the Trash by choosing File > Move to Trash.
6. Restart the computer and open iTunes.
7. Authorize your computer to play your purchases.
Note: If you have multiple accounts you will need to authorize your computer for each account.
Then if this happens...
“The file "iTunes Library.itl" cannot be read because it was created with a newer version of iTunes”
Close iTunes
Go to your iTunes folder –– it's either under:
· My Documents\My Music\iTunes\
· \Users\username\Music\iTunes\
(Make sure that it's right one by looking at the Time & Date of the FIle (should be the same, as the last time you closed iTunes)
Drag the iTunes Library file from the above location to the Desktop.
Open the Previous iTunes Libraries folder in the iTunes folder.
Locate the file named iTunes Library YYYY-MM-DD where YYYY-MM-DD is the date you upgraded iTunes (Year-Month-Day).
Drag this file to the iTunes folder (the enclosing folder).
Rename this file to iTunes Library.
Open iTunes.
Using “import library” in iTunes, I then reinstalled my library from the day before I put in the new iTunes.
(In my case, I used Time Machine)
However, all of my playlists were wiped out
Smarter folks than me can fill in the details, but this worked for me after all else failed.
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