diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index e38500fb3..54d35590d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -174,7 +174,7 @@ locally as a pre-commit hook checks formatting before committing automatically,
 just copy this script to `.git/hooks/pre-commit`.
 
 For each pull request, several different systems run the integration tests on
-Linux, OS X and Windows. We won't merge any code that does not pass all tests
+Linux, macOS and Windows. We won't merge any code that does not pass all tests
 for all systems, so when a tests fails, try to find out what's wrong and fix
 it. If you need help on this, please leave a comment in the pull request, and
 we'll be glad to assist. Having a PR with failing integration tests is nothing
diff --git a/doc/020_installation.rst b/doc/020_installation.rst
index 03afd0603..93285d5c0 100644
--- a/doc/020_installation.rst
+++ b/doc/020_installation.rst
@@ -71,7 +71,7 @@ avoid any conflicts:
 macOS
 =====
 
-If you are using Mac OS X, you can install restic using the
+If you are using macOS, you can install restic using the
 `homebrew <http://brew.sh/>`__ package manager:
 
 .. code-block:: console