Fiddler for Mac OS X: Now Available in Beta!

We are excited to announce that we have ported the latest version of Fiddler to the Mono Framework, which supports OS X. You can now download the beta bits and start using Fiddler on your Mac today.

Fiddler is a powerful tool that allows you to inspect traffic, set breakpoints, and 'fiddle' with incoming or outgoing data. While it's great that Fiddler for Windows can be used as a proxy for apps running on OS X, there are still many benefits to being able to run Fiddler natively on Mac.

We have received numerous requests from our user community to provide a Fiddler build for OS X, and we're thrilled to finally be able to deliver. Try out the beta version today and let us know what you think.

One issue that has been reported is that when Fiddler is operating and 'decrypt HTTPS traffic' is enabled, Safari may not be able to access some well-known sites such as Facebook, Twitter, or GitHub. This effect is currently limited to Safari and only occurs if you stopped at the site before opening Fiddler. However, simply refreshing the page or clicking on other areas of the website often resolves the issue.

The beta 1 release has also had some issues with resizing windows and elements within windows, which can result in poor or laggy redrawing of impacted elements. While we were aware of this issue when we started working on the macOS version of Fiddler, we opted to prioritize getting OS X support out faster rather than sacrificing our roadmap for Fiddler on Windows.

We hope you enjoy using Fiddler on your Mac and look forward to hearing your feedback and suggestions for further development. You can download the beta version now and join our Fiddler forum to leave your comments, ideas, and suggestions.

Fiddler for mac os x