It doesn’t appear to be compatible with El Capitan. I’ve sent support a request and will update the review once they respond. This is disappointing as I rely on this hourly and I’ve really liked the program. Update: No response from the authors of the program. Not sure if this means the program is now unsupported or what. Update: the authors of the program responded and confirmed that due to the sandboxing requirements, the appstore version would not work with El Capitan. If you want to use atext with El Capitan, we will need to switch to the non-sandboxed version on the author’s website.