[. . . ] You can eject a DVD or CD only when the drive is connected to your MacBook Air. [. . . ] It is important that you use compliant peripheral devices and shielded cables (including Ethernet network cables) between system components to reduce the possibility of causing interference to radios, television sets, and other electronic devices. This computer equipment generates, uses, and can radiate radio-frequency energy. If it is not installed and used properly--that is, in strict accordance with Apple's instructions--it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in Part 15 of FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. You can determine whether your computer system is causing interference by turning it off. If the interference stops, it was probably caused by the computer or one of the peripheral devices. [. . . ] Other company and product names mentioned herein may be trademarks of their respective companies. [. . . ]