Mac OS X 10.4: Network error (bad server response -1011) when using Software Update

If you're using Software Update in Mac OS X 10.4 "Tiger" and use a satellite-based Internet service provider (ISP) to connect, you may not be able to download updates. Instead, you may get an error code -1011 (bad server response) message.

You can address the issue by dragging these two Software Update Cache files to the Trash:

• "com.apple.SoftwareUpdate", located at /Library/Caches/
• "com.apple.SoftwareUpdate", located at ~/Library/Caches/

Note: For locating the first file, /Library refers to the Library folder at the top level (or "root") of your hard disk. For the second file, the tilde (~) refers to your Home folder.

Deleting the cache files is a temporary solution, and will only allow Software Update to function correctly one time. You'll need to delete the cache files each time you use Software Update. As a workaround, you can also download standalone update installers from Apple Downloads.