diff --git a/doc/user_guide/en/install-mac.adoc b/doc/user_guide/en/install-mac.adoc
index 636777b55..0ceb2ae6f 100644
--- a/doc/user_guide/en/install-mac.adoc
+++ b/doc/user_guide/en/install-mac.adoc
@@ -1,6 +1,6 @@
 // These instructions are up-to-date for WSJT-X v1.9
 
-*OS X 10.9* and later: Download the file {osx} to your desktop,
+*OS X 10.10* and later: Download the file {osx} to your desktop,
 double-click on it and consult its `ReadMe` file for important
 installation notes.