diff --git a/pages/osx/networksetup.md b/pages/osx/networksetup.md
index 39a3c48ed..a871b236c 100644
--- a/pages/osx/networksetup.md
+++ b/pages/osx/networksetup.md
@@ -1,6 +1,7 @@
 # networksetup
 
 > Configuration tool for Network System Preferences.
+> More information: <https://support.apple.com/guide/remote-desktop/about-networksetup-apdd0c5a2d5/mac>.
 
 - List available network service providers (Ethernet, Wi-Fi, Bluetooth, etc):
 
diff --git a/pages/osx/port.md b/pages/osx/port.md
index 2951f2d2c..0b5f2d281 100644
--- a/pages/osx/port.md
+++ b/pages/osx/port.md
@@ -1,6 +1,7 @@
 # port
 
 > Package manager for macOS.
+> More information: <https://www.macports.org>.
 
 - Search for a package:
 
diff --git a/pages/osx/xcode-select.md b/pages/osx/xcode-select.md
index 5383aa808..8d85ec14c 100644
--- a/pages/osx/xcode-select.md
+++ b/pages/osx/xcode-select.md
@@ -2,6 +2,7 @@
 
 > Switch between different versions of Xcode and the included developer tools.
 > Also used to update the path to Xcode if it is moved after installation.
+> More information: <https://developer.apple.com/library/archive/technotes/tn2339/_index.html>.
 
 - Install Xcode's command-line tools:
 
diff --git a/pages/osx/xcodebuild.md b/pages/osx/xcodebuild.md
index 7cc2926ca..a9831fa65 100644
--- a/pages/osx/xcodebuild.md
+++ b/pages/osx/xcodebuild.md
@@ -1,6 +1,7 @@
 # xcodebuild
 
 > Build Xcode projects.
+> More information: <https://developer.apple.com/library/archive/technotes/tn2339/_index.html>.
 
 - Build workspace: