Hi Shayja,
Unfortunately we cannot bring the link back up just yet, Apple is making it very difficult to distribute software for when we don't have access to Apple devices. For the time being, the only way to get the Uxn emulator running on OS X, is to build it from the source files, which means cloning or downloading the repository on sourcehut and writing .build.sh
Are you on irc or discord? maybe we can help you through that process :) Let us know!