Sorry for the confusion. The information is usually consistent. What happened this time is that I discovered after shipping the update that it crashes at launch on 10.11. Although the code is written and compiled to work back to 10.9, there was a change in Xcode that makes the binary not link properly on 10.11, causing the crash. This seems to be a widespread issue going back years, so I’m not expecting a fix from Apple. I can’t go back to the old way of building EagleFiler, which avoided that problem, because then it would not be possible to fully support macOS 11 Big Sur. So, for now at least, the “fix” was to update the site and software update feature to require 10.12 so that people don’t download a version that they can’t use. Longer term, I may be able to bring back support for macOS 10.11.
The Read Me and Info.plist will be updated in the next release. MacUpdate shows the correct requirements now. They don’t read the Info.plist; they just don’t always update the information that we submit. (The icon still has not been updated despite several submissions…)
You can download previous versions of EagleFiler here, and the library format is compatible so that you can use an older version on your 10.11 Macs and open the same library with EagleFiler 1.9 on a newer Mac.