diff --git a/zsh/aliases-darwin.zsh b/zsh/aliases-darwin.zsh
new file mode 100644
index 0000000..135a683
--- /dev/null
+++ b/zsh/aliases-darwin.zsh
@@ -0,0 +1,5 @@
+if [[ "$(uname)" != "Darwin" ]]; then
+  return
+fi
+
+alias list_identities='security find-identity -v -p codesigning'
diff --git a/zsh/functions-darwin.zsh b/zsh/functions-darwin.zsh
new file mode 100644
index 0000000..efa2e18
--- /dev/null
+++ b/zsh/functions-darwin.zsh
@@ -0,0 +1,8 @@
+if [[ "$(uname)" != "Darwin" ]]; then
+  return
+fi
+
+function remove_helper() {
+  sudo launchctl unload /Library/LaunchDaemons/com.$1.helper.plist; sudo rm /Library/PrivilegedHelperTools/com.$1.helper
+}
+