diff --git a/atom/browser/api/atom_api_window.cc b/atom/browser/api/atom_api_window.cc
index dc9f0f6a152e..122c5a68624d 100644
--- a/atom/browser/api/atom_api_window.cc
+++ b/atom/browser/api/atom_api_window.cc
@@ -381,8 +381,10 @@ std::vector<int> Window::GetMaximumSize() {
   return result;
 }
 
-void Window::SetSheetOffset(double offset) {
-  window_->SetSheetOffset(offset);
+void Window::SetSheetOffset(double offsetY, mate::Arguments* args) {
+  double offsetX = 0.0;
+  args->GetNext(&offsetX);
+  window_->SetSheetOffset(offsetX, offsetY);
 }
 
 void Window::SetResizable(bool resizable) {
diff --git a/atom/browser/api/atom_api_window.h b/atom/browser/api/atom_api_window.h
index 7746dd8d7681..f174cdba88c6 100644
--- a/atom/browser/api/atom_api_window.h
+++ b/atom/browser/api/atom_api_window.h
@@ -111,7 +111,7 @@ class Window : public mate::TrackableObject<Window>,
   std::vector<int> GetMinimumSize();
   void SetMaximumSize(int width, int height);
   std::vector<int> GetMaximumSize();
-  void SetSheetOffset(double offset);
+  void SetSheetOffset(double offsetY, mate::Arguments* args);
   void SetResizable(bool resizable);
   bool IsResizable();
   void SetMovable(bool movable);
diff --git a/atom/browser/native_window.cc b/atom/browser/native_window.cc
index 23a434a81b45..31567c197508 100644
--- a/atom/browser/native_window.cc
+++ b/atom/browser/native_window.cc
@@ -52,7 +52,8 @@ NativeWindow::NativeWindow(
       enable_larger_than_screen_(false),
       is_closed_(false),
       has_dialog_attached_(false),
-      sheet_offset_(0.0),
+      sheet_offset_x_(0.0),
+      sheet_offset_y_(0.0),
       aspect_ratio_(0.0),
       inspectable_web_contents_(inspectable_web_contents),
       weak_factory_(this) {
@@ -250,12 +251,17 @@ gfx::Size NativeWindow::GetMaximumSize() {
   return GetSizeConstraints().GetMaximumSize();
 }
 
-void NativeWindow::SetSheetOffset(const double offset) {
-  sheet_offset_ = offset;
+void NativeWindow::SetSheetOffset(const double offsetX, const double offsetY) {
+  sheet_offset_x_ = offsetX;
+  sheet_offset_y_ = offsetY;
 }
 
-double NativeWindow::GetSheetOffset() {
-  return sheet_offset_;
+double NativeWindow::GetSheetOffsetX() {
+  return sheet_offset_x_;
+}
+
+double NativeWindow::GetSheetOffsetY() {
+  return sheet_offset_y_;
 }
 
 void NativeWindow::SetRepresentedFilename(const std::string& filename) {
diff --git a/atom/browser/native_window.h b/atom/browser/native_window.h
index 6a96c013e79e..7bc432d45deb 100644
--- a/atom/browser/native_window.h
+++ b/atom/browser/native_window.h
@@ -123,8 +123,9 @@ class NativeWindow : public base::SupportsUserData,
   virtual gfx::Size GetMinimumSize();
   virtual void SetMaximumSize(const gfx::Size& size);
   virtual gfx::Size GetMaximumSize();
-  virtual void SetSheetOffset(const double offset);
-  virtual double GetSheetOffset();
+  virtual void SetSheetOffset(const double offsetX, const double offsetY);
+  virtual double GetSheetOffsetX();
+  virtual double GetSheetOffsetY();
   virtual void SetResizable(bool resizable) = 0;
   virtual bool IsResizable() = 0;
   virtual void SetMovable(bool movable) = 0;
@@ -316,8 +317,10 @@ class NativeWindow : public base::SupportsUserData,
   // it should be cancelled when we can prove that the window is responsive.
   base::CancelableClosure window_unresposive_closure_;
 
-  // Used to display sheets at the appropriate vertical offset
-  double sheet_offset_;
+  // Used to display sheets at the appropriate horizontal and vertical offsets
+  // on OS X.
+  double sheet_offset_x_;
+  double sheet_offset_y_;
 
   // Used to maintain the aspect ratio of a view which is inside of the
   // content view.
diff --git a/atom/browser/native_window_mac.mm b/atom/browser/native_window_mac.mm
index bfffc7a08d64..333b282266f5 100644
--- a/atom/browser/native_window_mac.mm
+++ b/atom/browser/native_window_mac.mm
@@ -257,7 +257,9 @@ bool ScopedDisableResize::disable_resize_ = false;
 - (NSRect)window:(NSWindow*)window
     willPositionSheet:(NSWindow*)sheet usingRect:(NSRect)rect {
   NSView* view = window.contentView;
-  rect.origin.y = view.frame.size.height - shell_->GetSheetOffset();
+
+  rect.origin.x = shell_->GetSheetOffsetX();
+  rect.origin.y = view.frame.size.height - shell_->GetSheetOffsetY();
   return rect;
 }
 
diff --git a/docs/api/browser-window.md b/docs/api/browser-window.md
index aa21e5fd59ad..0bd38dec560e 100644
--- a/docs/api/browser-window.md
+++ b/docs/api/browser-window.md
@@ -683,7 +683,7 @@ Returns the title of the native window.
 **Note:** The title of web page can be different from the title of the native
 window.
 
-### `win.setSheetOffset(offset)` _OS X_
+### `win.setSheetOffset(offsetY[, offsetX])` _OS X_
 
 Changes the attachment point for sheets on Mac OS X. By default, sheets are
 attached just below the window frame, but you may want to display them beneath