diff --git a/kitty/cocoa_window.m b/kitty/cocoa_window.m
index e8543289c..362790e0c 100644
--- a/kitty/cocoa_window.m
+++ b/kitty/cocoa_window.m
@@ -9,6 +9,25 @@
 #include "data-types.h"
 #include <Cocoa/Cocoa.h>
 
+#include <AvailabilityMacros.h>
+
+#if (MAC_OS_X_VERSION_MAX_ALLOWED < 101200)
+#define NSWindowStyleMaskResizable NSResizableWindowMask
+#endif
+
+PyObject*
+cocoa_make_window_resizable(PyObject UNUSED *self, PyObject *window_id) {
+    NSWindow *window = (NSWindow*)PyLong_AsVoidPtr(window_id);
+    
+    @try {
+        [window setStyleMask:
+            [window styleMask] | NSWindowStyleMaskResizable];
+    } @catch (NSException *e) {
+        return PyErr_Format(PyExc_ValueError, "Failed to set style mask: %s: %s", [[e name] UTF8String], [[e reason] UTF8String]);
+    }
+    Py_RETURN_NONE;
+}
+
 PyObject*
 cocoa_get_lang(PyObject UNUSED *self) {
     NSString* locale = nil;
diff --git a/kitty/glfw.h b/kitty/glfw.h
index ad3e0064d..bfda0ba8f 100644
--- a/kitty/glfw.h
+++ b/kitty/glfw.h
@@ -21,9 +21,12 @@ PyObject* glfw_init_hint_string(PyObject UNUSED *self, PyObject *args);
 
 #ifdef __APPLE__
 PyObject* cocoa_get_lang(PyObject UNUSED *self);
+PyObject* cocoa_make_window_resizable(PyObject UNUSED *self, PyObject *window_id);
 #define COCOA_GET_LANG {"cocoa_get_lang", (PyCFunction)cocoa_get_lang, METH_NOARGS, ""}, 
+#define COCOA_MWR {"cocoa_make_window_resizable", (PyCFunction)cocoa_make_window_resizable, METH_O, ""},
 #else
 #define COCOA_GET_LANG
+#define COCOA_MWR
 #endif
 
 #define GLFW_FUNC_WRAPPERS \
@@ -37,5 +40,5 @@ PyObject* cocoa_get_lang(PyObject UNUSED *self);
     {"glfw_get_physical_dpi", (PyCFunction)glfw_get_physical_dpi, METH_NOARGS, ""}, \
     {"glfw_get_key_name", (PyCFunction)glfw_get_key_name, METH_VARARGS, ""}, \
     {"glfw_init_hint_string", (PyCFunction)glfw_init_hint_string, METH_VARARGS, ""}, \
-    COCOA_GET_LANG
-
+    COCOA_GET_LANG \
+    COCOA_MWR
diff --git a/kitty/main.py b/kitty/main.py
index 776857d28..c2df87ef5 100644
--- a/kitty/main.py
+++ b/kitty/main.py
@@ -212,6 +212,9 @@ def run_app(opts, args):
     window.make_context_current()
     if isosx:
         check_for_extensions()
+        if opts.macos_hide_titlebar:
+            from .fast_data_types import cocoa_make_window_resizable
+            cocoa_make_window_resizable(window.cocoa_window_id())
     else:
         with open(logo_data_file, 'rb') as f:
             window.set_icon(f.read(), 256, 256)