Next, save your work in any open applications and restart the computer to make sure the problem is entirely cleared up. If you need to, you can also restart the Finder from this dialog. The application quits, leaving all other applications open. The Force Quit Applications dialog appears with the application selected.Press Command – Option-Esc or choose Apple Menu > Force Quit from the menu bar.
Mac OS X provides a way to quit a frozen application without restarting the computer. On rare occasions, an application might “freeze” on the screen. Any hardware that you installed, such as additional memory, a peripheral, etc.
Keep in mind that making a note of things you did before the problem occurred will help you narrow down possible causes and find the answers you need. Think about the conditions that led up to the problem. Troubleshooting with MacBook 5.1: Occasionally you may have problems while working with your computer, but if you experience a problem with your MacBook, there is usually a simple and quick solution. This model was shipped with one price of US$999.MacBook 5.2 – 55-watt-hour removable lithium-polymer. Battery: MacBook 5.1 – 45-watt-hour removable lithium-polymer.1 × Combined optical digital output/analog line out. Combined optical digital input/analog line in. Input: Multi-touch glass trackpad which also acts as the mouse button.Two slots for PC3-8500 DDR3 SDRAM (1066 Mhz). Ports: Mini DisplayPort, replacing the previous model’s mini-DVI port.1 × Optical digital / analog audio line-out.
1 × Optical digital / analog audio line-in.