Note about signed binary.

Author: dherbst

README.md

@@ -23,6 +23,7 @@ Alternatively, you can use the `go install` command which should install the `se
     make install-local
 
 ### Download the binary
+> **_NOTE:_** If you use OSX Catalina, this binary is not currently signed.  See #2 for progress.
 You can download the latest osx binary `septa` at https://github.com/dherbst/septa/releases.  If you need a windows version please open an issue.
 
 ## Commands