UI Browser

UI Browser is the ultimate assistant for Apple’s Accessibility and AppleScript GUI Scripting technologies. It helps you to explore, monitor, and control the user interface of most applications running on macOS.

What’s Happening

In April 2022, Bill Cheeseman announced UI Browser end-of-life:

UI Browser End of Life: UI Browser will reach its end of life and be retired on October 17, 2022. The current release of UI Browser, version 3.0.2, will not be updated. On the end-of-life retirement date, the PFiddlesoft website will be closed. Thereafter, it will no longer be possible to download or purchase UI Browser, and product support will no longer be available. UI Browser has been a labor of love for me, its sole developer for almost twenty years. Now that I am 79 years old, it is time to bring this good work to a conclusion. Bill Cheeseman, April 17, 2022.

Bill has graciously agreed to allow Late Night Software to continue making UI Browser available to those that purchased it before it was withdrawn. If you do not have an existing license the software will run for 30 days in trial mode.


  • Intel or Apple Silicon Macintosh
  • macOS Sierra 10.12 or later


UI Browser 3.0.2 (4Mb)


Late Night Software provider a section on its on-line support forum for discussion related to UI Browser. Late Night Software does not offer support for UI Browser.


UI Browser is no longer available for purchase. UI Browser’s source code will not be released as open-source. Late Night Software will continue making UI Browser available and supporting it on a best-effort basis for as long as there is a demand for the software.


The home of Script Debugger