Fixed macOS text
From 2016, Apple is branding its OS as macOS.
See
@@ -22,7 +22,7 @@ Please follow [OpenShift documentation](https://docs.openshift.org/latest/cli_re
You can download latest master builds from [Bintray](https://dl.bintray.com/ocdev/ocdev/latest/) or
builds for released versions from [GitHub releases page](https://github.com/redhat-developer/ocdev/releases).
-### MacOS
+### macOS
1. First you need enable `kadel/ocdev` Homebrew Tap:
```sh
brew tap kadel/ocdev
