Download of Netopsy 1.5 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program relates to Internet & Network Tools. This free Mac application is a product of Dave Weston. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
Netopsy is an application for viewing network traces (SAZ files) created by the Fiddler web debugging proxy. The program lets you view requests and responses in multiple formats to debug issues at various levels of your stack. You can use multiple documents for comparing sessions from multiple users, and open large archives with thousands of recorded sessions.
You may want to check out more software for Mac, such as NetCheck, QuickWho or Super Ping Pro, which might be similar to Netopsy.