diff --git a/README.md b/README.md
index 9f07f0c..6bb7c3f 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
 [![npm version](https://img.shields.io/npm/v/shelljs.svg?style=flat-square)](https://www.npmjs.com/package/shelljs)
 [![npm downloads](https://img.shields.io/npm/dm/shelljs.svg?style=flat-square)](https://www.npmjs.com/package/shelljs)
 
-ShellJS is a portable **(Windows/Linux/OS X)** implementation of Unix shell
+ShellJS is a portable **(Windows/Linux/macOS)** implementation of Unix shell
 commands on top of the Node.js API. You can use it to eliminate your shell
 script's dependency on Unix while still keeping its familiar and powerful
 commands. You can also install it globally so you can run it from outside Node