I’m running the Music Manager (OS X) to upload a playlist I created in iTunes specifically for Google (be sure to uncheck or check all songs in the playlist or it will only upload the ones that are checked). The Google Music Manager stuck at 89 of 2140 songs and remained like that for days. Eventually I gave up after trying Google’s own directions. They say…

First, check that your internet connection is currently active.

If your connection is active, the following troubleshooting steps may resolve the issue:

Sign out and then back in to the Music Manager:

1. Click the Music Manager icon  in your system tray at the bottom right of your screen (Windows), menu bar in the upper right corner (Mac) or notifications area (Linux) to access the Music Manager.
2. Select the ‘Advanced’. tab
3. Click ‘Sign Out’.
4. On the sign-in screen that appears, sign back in to your Google account.

Restart the Music Manager:

1. Right-click the Music Manager icon in your system tray at the bottom right of your screen (Windows), menu bar in the upper right corner (Mac) or notifications area (Linux).
2. Select ‘Quit’.
3. Restart the Music Manager from your program list.

If the problem persists, restarting your computer or uninstalling and reinstalling the Music Manager may resolve the issue.

Lastly, you can manually start the process to add music and then use the Music Manager troubleshooter for additional information.

Temporarily set the Music Manager to manually add music, then use the Music Manager troubleshooter:

1. Access the Music Manager and select the ‘Upload’ tab
2. Uncheck the box for ‘Automatically upload songs added to my selected folders’
3. Click ‘Upload’
4. After attempting to add music manually, feel free to return your upload frequency to its original setting.
5. Right-click the Music Manager icon  in your system tray at the bottom right of your screen (Windows), menu bar in the upper right corner (Mac) or notifications area (Linux)
6. Select ‘Run troubleshooter’

If none of the above solve the issue you are experiencing, you can work around the issue by temporarily removing the problematic songs from your destination folder so that the Music Manager can progress to the rest of your library.

http://www.google.com/support/androidmarket/bin/answer.py?answer=1144026

Well, it didn’t work. What did seem to do the trick was to go to Home directory -> Library -> Application Support and remove the Music Manager directory. Fired the software back up and it’s been cruising right along.

Also noteworthy is that my Android phone apparently doesn’t support the Google Music app, so it doesn’t appear in the Market. I located the .apk file on the interwebs and mailed it to my gmail account. From the native Gmail app, you can install the .apk from the attachment. It seems most (maybe all?) apps work like this. My phone runs the app just fine.

Final note: the support url above is one of the only url’s from Google that I’ve ever seen an extension on before. (python)