diff --git a/docs/documentation/install_guide/Install-Guide.md b/docs/documentation/install_guide/Install-Guide.md
index 2b04d636..1afbf4bc 100644
--- a/docs/documentation/install_guide/Install-Guide.md
+++ b/docs/documentation/install_guide/Install-Guide.md
@@ -43,7 +43,7 @@ Trick needs the javac compiler included in the Java Development Kit (JDK). Trick
 **Installing both the Oracle JDK and OpenJDK may lead to problems and confusion.**
 
 # Operating Systems
-Trick runs on GNU/Linux and MacOSX, though any System V/POSIX compatible UNIX workstation should accept the Trick software with very little source code porting. Below are instructions for installing the prerequisites on popular operating systems here at NASA.
+Trick runs on GNU/Linux and macOS, though any System V/POSIX compatible UNIX workstation should accept the Trick software with very little source code porting. Below are instructions for installing the prerequisites on popular operating systems here at NASA.
 
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