I downloaded an album from iTunes and some of the songs downloaded but others didn't there was an error message 8003 Unknown error occurred. While I downloaded the album to my phone, it wouldn't download to my mac, what am I doing wrong???

Hello mercdw,

Once the music has been downloaded to your iPhone, you can transfer purchases from your device to iTunes.

iTunes Store: Transferring purchases from your iOS device or iPod to a computer

http://support.apple.com/kb/HT1848

Alternatively, the following article provides further information regarding this error and steps that can help resolve the issue.

"Error -50," "-5000," "8003," "8008," or "-42023"

These alerts occur due to timeouts or conflicts trying to write a file during download.

If you encounter this issue while accessing iTunes Store:

See iTunes 9: "One Moment Please" or "Error (-50)" message when accessing iTunes Store

If you encounter this issue while while downloading something from the iTunes Store:

Delete your iTunes Downloads folder, located in:

Mac OS X:
 ~/Music/iTunes/iTunes Media/Downloads Note: "iTunes Media" may appear as "iTunes Music. Also, the tilde (~) refers to your Home directory.

Windows Vista:
 \Users\username\Music\iTunes\iTunes Media\Downloads\

Windows 7:
 \Users\username\My Music\iTunes\iTunes Media\Downloads\

Windows XP:
 \Documents and Settings\username\My Documents\My Music\iTunes\iTunes Media\Downloads\

After locating your iTunes Downloads folder:

1. Quit iTunes.
2. Delete the Downloads folder on your computer.
3. Open iTunes.
4. Choose Store > Check for Available Downloads.
5. Enter your account name and password.

If you encounter this issue while while downloading Digital Copies using Windows:

Use MSCONFIG (directions for Windows XP and Windows Vista/Windows 7) to disable conflicting software.

If using MSCONFIG steps resolves the issue, you may want to use the System Configuration Utility to turn on the third-party System Services and Startup Items one at a time (restarting your computer after turning on the item or items) to identify which System Service or Startup Item is causing the conflict.

You can turn all of them back on by selecting the Normal Startup option under the General tab of the System Configuration Utility window, but please note that this may cause the issue to reoccur.

If you are able to isolate the issue to a particular third-party software, you may wish to contact them to let them know of the conflict.