Hello, I am using Mac OS/X 10.8.5. There have been some issues with QuickTime 7. 1. When I double clicked a video file or chose QuickTime 7 to be the application, it took a long time to load. Then, it opened several videos that I watched in the past. 2. Very often, the fireball keeps spinning. Nothing is being shown on screen. 3. When I used QT7 to open a .m4a audio file, and dragged the progress bar, very often the fireball just keeps spinning and no audio is played. Any solution appreciated. Thanks.