GLFW problem

#include <Cocoa/Cocoa.h>

#include <GLFW/glfw3.h>

#define GLFW_EXPOSE_NATIVE_NSGL
#define GLFW_EXPOSE_NATIVE_COCOA
#include <GLFW/glfw3native.h>

void testOpenPanel()
{
    NSOpenPanel* openPanel = [NSOpenPanel openPanel];

    openPanel.title = @"Choose a .JSON file";
    openPanel.showsResizeIndicator = YES;
    openPanel.showsHiddenFiles = NO;
    openPanel.canChooseDirectories = NO;
    openPanel.canCreateDirectories = YES;
    openPanel.allowsMultipleSelection = NO;
    openPanel.allowedFileTypes = @[@"json"];

    [openPanel beginWithCompletionHandler:^(NSInteger result) {
        if (result == NSModalResponseOK) {
            NSURL *selection = openPanel.URLs[0];
            NSString* path = [selection.path stringByResolvingSymlinksInPath];
            NSLog(@"Path: %@", path);
        }
    }];
}

void testSavePanel()
{
    NSSavePanel* savePanel = [NSSavePanel savePanel];

    savePanel.title = @"Choose a .JSON file";
    savePanel.showsResizeIndicator = YES;
    savePanel.showsHiddenFiles = NO;
    savePanel.canCreateDirectories = YES;
    savePanel.allowedFileTypes = @[@"json"];

    [savePanel beginWithCompletionHandler:^(NSInteger result) {
        if (result == NSModalResponseOK) {
            NSURL *selection = savePanel.URL;
            NSString* path = [selection.path stringByResolvingSymlinksInPath];
            NSLog(@"Path: %@", path);
        }
    }];
}

static void error_callback(int error, const char* description)
{
    fputs(description, stderr);
}
static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
    if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
        glfwSetWindowShouldClose(window, GL_TRUE);
}

int main(void)
{
    GLFWwindow* window;
    glfwSetErrorCallback(error_callback);
    if (!glfwInit())
        exit(EXIT_FAILURE);
    window = glfwCreateWindow(640, 480, "Simple example", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        exit(EXIT_FAILURE);
    }
    glfwMakeContextCurrent(window);
    glfwSwapInterval(1);
    glfwSetKeyCallback(window, key_callback);

    NSWindow* cocoaWindow = glfwGetCocoaWindow(window);
    NSOpenGLContext* context = glfwGetNSGLContext(window);

    testOpenPanel();

    while (!glfwWindowShouldClose(window))
    {
        //[context makeCurrentContext];

        glfwMakeContextCurrent(nullptr);
        glfwMakeContextCurrent(window);

        float ratio;
        int width, height;
        glfwGetFramebufferSize(window, &width, &height);
        ratio = width / (float) height;
        glViewport(0, 0, width, height);

        glClear(GL_COLOR_BUFFER_BIT);

        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();

        glOrtho(-ratio, ratio, -1.f, 1.f, 1.f, -1.f);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();
        glRotatef((float) glfwGetTime() * 50.f, 0.f, 0.f, 1.f);

        glBegin(GL_TRIANGLES);

        glColor3f(1.f, 0.f, 0.f);
        glVertex3f(-0.6f, -0.4f, 0.f);
        glColor3f(0.f, 1.f, 0.f);
        glVertex3f(0.6f, -0.4f, 0.f);
        glColor3f(0.f, 0.f, 1.f);
        glVertex3f(0.f, 0.6f, 0.f);
        CHECK_GL_ERROR_DEBUG();

        glEnd();

        glfwSwapBuffers(window);

        glfwPollEvents();
    }
    glfwDestroyWindow(window);
    glfwTerminate();
    exit(EXIT_SUCCESS);
}