diff --git a/.gitignore b/.gitignore
index 5fbfdc6e52..58c6ed065f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-# OS X filesystem custom folder attributes
+# macOS filesystem custom folder attributes
 .DS_Store
 
 # Bundler-specific files
diff --git a/README.md b/README.md
index 57f5feb810..42cc1c7b01 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ Surely people could benefit from simplified man pages focused on practical examp
 ![tldr screenshot](screenshot.png)
 
 This repository is just that: an ever-growing collection of examples
-for the most common UNIX / Linux / OSX / SunOS commands.
+for the most common UNIX / Linux / macOS / SunOS commands.
 
 ## Clients
 
diff --git a/pages/osx/brew.md b/pages/osx/brew.md
index 32f9369068..52e733e330 100644
--- a/pages/osx/brew.md
+++ b/pages/osx/brew.md
@@ -1,6 +1,6 @@
 # brew
 
-> Package manager for OS X.
+> Package manager for macOS.
 
 - Search for available formulas:
 
diff --git a/pages/osx/defaults.md b/pages/osx/defaults.md
index 5ad3ab3da3..9a359da9e3 100644
--- a/pages/osx/defaults.md
+++ b/pages/osx/defaults.md
@@ -1,6 +1,6 @@
 # defaults
 
-> Read and write OS X user configuration for applications.
+> Read and write macOS user configuration for applications.
 
 - Read system defaults for an application option:
 
diff --git a/pages/osx/open.md b/pages/osx/open.md
index d4d1152c0b..24cc21e0d5 100644
--- a/pages/osx/open.md
+++ b/pages/osx/open.md
@@ -6,7 +6,7 @@
 
 `open {{file.ext}}`
 
-- Run a graphical MacOSX application:
+- Run a graphical macOS application:
 
 `open /Applications/{{Application.app}}`
 
diff --git a/pages/osx/sw_vers.md b/pages/osx/sw_vers.md
index e93d2ad106..f06ab63333 100644
--- a/pages/osx/sw_vers.md
+++ b/pages/osx/sw_vers.md
@@ -1,11 +1,11 @@
 # sw_vers
 
-> Print Mac OSX Software versioning information.
+> Print macOS Software versioning information.
 
-- Print OSX Version:
+- Print macOS Version:
 
 `sw_vers -productVersion`
 
-- Print OSX Build:
+- Print macOS Build:
 
 `sw_vers -buildVersion`
diff --git a/pages/osx/wacaw.md b/pages/osx/wacaw.md
index c02c670b37..0bb5ba19d5 100644
--- a/pages/osx/wacaw.md
+++ b/pages/osx/wacaw.md
@@ -1,6 +1,6 @@
 # wacaw
 
-> A little command-line tool for Mac OS X that allows you to capture both still pictures and video from an attached camera.
+> A little command-line tool for macOS that allows you to capture both still pictures and video from an attached camera.
 
 - Take a picture from webcam: