Learn about the power supplies in various Apple products and whether they can switch automatically to voltages in other countries. Some Apple computers have an auto-switching power supply, which monitors the incoming voltage and automatically switches itself accordingly. Other Apple computers have a power supply that must be manually switched for various incoming voltages. The change is made by moving the voltage selector switch, which is accessible from outside the computer's case. Still other Apple computers have a power supply that is rated only for the country in which it is sold, and is not switchable to
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