Update README.md

Author: spincycle01

README.md

@@ -13,6 +13,8 @@
 
 Download for [MacOS](https://github.com/team-reactype/ReacType/releases/tag/Mac.Version.1.0), [Windows](https://github.com/team-reactype/ReacType/releases/tag/Win.Version.1.0), [Linux](https://github.com/team-reactype/ReacType/releases/tag/Linux.Version.1.0).
 
+* Mac users only: for now you might need to go to your security settings to allow the app run on your system as we do not have an Apple license yet.
+
 ![Image of ReacType Application](https://i.imgur.com/2sefnAk.jpg)
 
 ### How to use