Photoshop 7 on OS X has an annoying habit of performing network updates every time you launch or quit the application. Annoying as hell. To disable the Photoshop network checking nonsense, do the following:

• open a Finder window
• type Command-Shift-G
• paste this: /Library/Application Support/Adobe
• select the folder "Web" and rename it to "Web.disabled" (or something else descriptive)