Q: I can't get my new iTunes to work on my iMac w/ Snow Leopard. Followed all downloading instructions. No window appears. Help.

Hello there, Dizzy Dude.

The following Knowledge Base article may get you some information on trying to get your software up-to-date:

Troubleshooting Mac OS X installation and software updates (Mac OS X v10.6 and earlier)

http://support.apple.com/kb/TS1394

Specifically:

Try a different software update source or disc if possible

Software Updates for Mac OS X and Apple applications for Mac OS X are often available in different ways:

• Software Update preferences
• Standalone installer from Apple Downloads.

Try getting the software from a different source, or download it again.

Software Update can be a much easier resource to update your software with than downloading which requires the additional step of installing after the download completes.

Thanks for reaching out to Apple Support Communities.

Cheers,

Pedro.