diff --git a/pages/osx/defaults.md b/pages/osx/defaults.md
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+# defaults
+
+> Access OS X user defaults
+
+- read system default value
+
+`defaults read {{domain}} {{key}}`
+
+- read default values of applications
+
+`defaults read -app {{app_name}} {{key}}`
+
+- write key value
+
+`defaults write {{domain}} {{key}} {{-type}} {{value}}`
+
+- Speed up Mission Control animations
+
+`defaults write com.apple.Dock expose-animation-duration -float 0.1`
+
+- __[caution]__ delete all defaults of domain
+
+`defaults delete {{domain}}`
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