Downloading Curl RTE 8.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The latest installer that can be downloaded is 3.8 MB in size. The application lies within Developer Tools, more precisely IDE. 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:
The Curl RTE is a proprietary runtime that allows Curl applications to execute on client PCs. Installing the Curl RTE gives user access to rich, responsive Web applications.
You may want to check out more Mac applications, such as Age of Curling, Curl or AV Bros. Page Curl Pro, which might be related to Curl RTE.