Update README.md

Co-authored-by: Chris O'Hara <cohara87@gmail.com>

Author: achille-roussel

README.md

@@ -40,8 +40,8 @@ To get started, follow the instructions to [sign up for Dispatch][signup] 🚀.
 ### Installing the Dispatch CLI
 
 As a pre-requisite, we recommend installing the Dispatch CLI to simplify the
-configuration and execution of applications that use Dispatch. On OSX, this
-can be done easily using the [Homebrew](https://docs.brew.sh/) tap:
+configuration and execution of applications that use Dispatch. On macOS, this
+can be done easily using [Homebrew](https://docs.brew.sh/):
 
 ```console
 brew tap stealthrocket/dispatch