CGRectMake 1.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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. The actual developer of this free Mac application is Carolina Gradel and Gustavo Severo. The program lies within Developer Tools, more precisely Debugging Tools.
From the developer:
CGRectMake is designed for developers who code their UIs without Storyboard. All you need to do is choose the device that you've designed your UI for; copy the x, y, width, and height values; give a name to your CGRect, and then click on "calculate" and copy your code.
You may want to check out more software for Mac, such as AskKey, Affrus or Deskzilla, which might be related to CGRectMake.