Hi Jerome On Tuesday 23 November 2004 04:22 am, Jerome Rabas wrote: > Does the speed issue in windowed mode only happen with OS X? On most platforms I would expect windowed-mode to be slightly slower than full-screen - if only for the reason that UAE gets the display to itself in full-screen mode and so there's less clipping, layering, or whatever for the graphics system to take care of. On OS X, the difference is substantial, however. This is because, in windowed mode, the rendering has to go through the Quartz compositing layer. Using OpenGL to render UAE's output to the screen may improve things in windowed mode. I plan to implement this for version 0.8.28 (or whatever I end up calling the next version). Cheers, Rich