diff --git a/native/atom_cef_client.cpp b/native/atom_cef_client.cpp
index 985441c23..b9adee9fd 100644
--- a/native/atom_cef_client.cpp
+++ b/native/atom_cef_client.cpp
@@ -22,19 +22,29 @@ bool AtomCefClient::OnProcessMessageReceived(CefRefPtr<CefBrowser> browser,
                                              CefProcessId source_process,
                                              CefRefPtr<CefProcessMessage> message) {
   std::string name = message->GetName().ToString();
-  CefRefPtr<CefListValue> argumentList = message->GetArgumentList();  
+  CefRefPtr<CefListValue> argumentList = message->GetArgumentList();
   int messageId = argumentList->GetInt(0);
 
-  
   if (name == "open") {
-    bool hasArguments = message->GetArgumentList()->GetSize() > 1;
-    hasArguments ? Open(message->GetArgumentList()->GetString(1)) : Open();
+    bool hasArguments = argumentList->GetSize() > 1;
+    hasArguments ? Open(argumentList->GetString(1)) : Open();
     return true;
   }
   if (name == "newWindow") {
     NewWindow();
     return true;
   }
+  if (name == "confirm") {
+    std::string message = argumentList->GetString(1).ToString();
+    std::string detailedMessage = argumentList->GetString(2).ToString();
+    std::vector<std::string> buttonLabels(argumentList->GetSize() - 3);
+    for (int i = 3; i < argumentList->GetSize(); i++) {
+      buttonLabels[i - 3] = argumentList->GetString(i).ToString();
+    }
+
+    Confirm(messageId, message, detailedMessage, buttonLabels, browser);
+    return true;
+  }
 
 
   return false;
diff --git a/native/atom_cef_client.h b/native/atom_cef_client.h
index 014de4701..424f7b821 100644
--- a/native/atom_cef_client.h
+++ b/native/atom_cef_client.h
@@ -91,7 +91,7 @@ class AtomCefClient : public CefClient,
   // CefLifeSpanHandler methods
   virtual void OnAfterCreated(CefRefPtr<CefBrowser> browser) OVERRIDE;
   virtual void OnBeforeClose(CefRefPtr<CefBrowser> browser) OVERRIDE;
-  
+
 
   // CefLoadHandler methods
   virtual void OnLoadError(CefRefPtr<CefBrowser> browser,
@@ -108,6 +108,11 @@ class AtomCefClient : public CefClient,
   void Open(std::string path);
   void Open();
   void NewWindow();
+  void Confirm(int replyId,
+               std::string message,
+               std::string detailedMessage,
+               std::vector<std::string> buttonLabels,
+               CefRefPtr<CefBrowser> browser);
 
   IMPLEMENT_REFCOUNTING(AtomCefClient);
   IMPLEMENT_LOCKING(AtomCefClient);
diff --git a/native/atom_cef_client_mac.mm b/native/atom_cef_client_mac.mm
index bbd95d2a8..def640cca 100644
--- a/native/atom_cef_client_mac.mm
+++ b/native/atom_cef_client_mac.mm
@@ -20,4 +20,29 @@ void AtomCefClient::Open() {
 
 void AtomCefClient::NewWindow() {
   [(AtomApplication *)[AtomApplication sharedApplication] open:nil];
-}
\ No newline at end of file
+}
+
+void AtomCefClient::Confirm(int replyId,
+                            std::string message,
+                            std::string detailedMessage,
+                            std::vector<std::string> buttonLabels,
+                            CefRefPtr<CefBrowser> browser) {
+  NSAlert *alert = [[[NSAlert alloc] init] autorelease];
+  [alert setMessageText:[NSString stringWithCString:message.c_str() encoding:NSUTF8StringEncoding]];
+  [alert setInformativeText:[NSString stringWithCString:detailedMessage.c_str() encoding:NSUTF8StringEncoding]];
+
+  for (int i = 0; i < buttonLabels.size(); i++) {
+    NSString *title = [NSString stringWithCString:buttonLabels[i].c_str() encoding:NSUTF8StringEncoding];
+    NSButton *button = [alert addButtonWithTitle:title];
+    [button setTag:i];
+  }
+
+  NSUInteger clickedButtonTag = [alert runModal];
+
+  CefRefPtr<CefProcessMessage> replyMessage = CefProcessMessage::Create("reply");
+  CefRefPtr<CefListValue> replyArguments = replyMessage->GetArgumentList();
+  replyArguments->SetSize(2);
+  replyArguments->SetInt(0, replyId);
+  replyArguments->SetInt(1, clickedButtonTag);
+  browser->SendProcessMessage(PID_RENDERER, replyMessage);
+}
diff --git a/src/app/atom.coffee b/src/app/atom.coffee
index c406c72ef..359e88aa2 100644
--- a/src/app/atom.coffee
+++ b/src/app/atom.coffee
@@ -15,7 +15,9 @@ atom.sendMessageToBrowserProcess = (name, data, callback) ->
   originalSendMessageToBrowserProcess(name, data)
 
 atom.receiveMessageFromBrowserProcess = (name, data) ->
-  console.log "RECEIVE MESSAGE IN JS", name, data
+  if name is 'reply'
+    [messageId, callbackIndex] = data
+    @pendingBrowserProcessCallbacks[messageId]?[callbackIndex]?()
 
 atom.open = (args...) ->
   @sendMessageToBrowserProcess('open', args)
@@ -23,6 +25,14 @@ atom.open = (args...) ->
 atom.newWindow = (args...) ->
   @sendMessageToBrowserProcess('newWindow', args)
 
+atom.confirm = (message, detailedMessage, buttonLabelsAndCallbacks...) ->
+  args = [message, detailedMessage]
+  callbacks = []
+  while buttonLabelsAndCallbacks.length
+    args.push(buttonLabelsAndCallbacks.shift())
+    callbacks.push(buttonLabelsAndCallbacks.shift())
+  @sendMessageToBrowserProcess('confirm', args, callbacks)
+
 atom.getRootViewStateForPath = (path) ->
   if json = localStorage[path]
     JSON.parse(json)