Movies on OS X

Hello Everyone,

I am trying to save a movie in Matlab. The figure display correctly however the movie file doesn't the figure window but it shows a part of figure window and part of the Matlab UI. I am using Matlab 2013a on OS X 10.9.4. I am pasting the code below. Please suggest why this is happening. I dock the figure window to the Matlab desktop by default.

clear; 
close all;

% Creates a 2D Mesh to plot surface
x=linspace(0,1,100);
[X,Y] = meshgrid(x,x);

N=100; % Number of frames

set(gca,'nextplot','replacechildren');
set(gcf,'Renderer','zbuffer');

M(N) = struct('cdata',[],'colormap',[]);

   for i = 1:N
    % Example of plot 
    Z = sin(2*pi*(X-i/N)).*sin(2*pi*(Y-i/N));
    surf(X,Y,Z)
    % Store the frame   
    M(i)=getframe; % leaving gcf out crops the frame in the movie.

end 

myVideo = VideoWriter('wavemotion.m4v', 'MPEG-4');
open(myVideo);
writeVideo(myVideo,M)
close(myVideo)