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Archived - Apple Power Supplies: Changing voltage settings

Learn about the power supplies in various Apple products and whether they can switch automatically to voltages in other countries.

This article has been archived and is no longer updated by Apple.

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. In this case, 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 it cannot switch to other voltages.

The table below shows what type of power supply is in various recent Macintosh models. Some models can use the World Travel Adapter Kit. If your computer cannot use the World Travel Adapter Kit and you need a power adapter or power cord with an appropriate plug, contact an Apple-Authorized Service Provider (AASP) in the region.

Mac Pro
Mac Pro (all models) Auto-Switching
Power Mac G5
Power Mac G5 (all models) Auto-Switching
Power Mac G4
Power Mac G4 (Mirrored Drive Doors 2003) Auto-Switching
Power Mac G4 (FW 800) Auto-Switching
Power Mac G4 (Mirrored Drive Doors) Auto-Switching
Power Mac G4 (QuickSilver 2002) Auto-Switching
Power Mac G4 (QuickSilver) Auto-Switching
Power Mac G4 (Digital Audio) Manual
Power Mac G4 (Gigabit Ethernet) Manual
Power Mac G4 Cube Auto-Switching
Power Mac G4 (PCI Graphics) Manual
Power Mac G4 (AGP Graphics) Manual
Power Macintosh G3
Power Macintosh G3 (Blue and White) Manual
Power Macintosh G3 Mini Tower Manual
Power Macintosh G3 Desktop Manual
Power Macintosh G3 All-in-one Auto-Switching
iMac
iMac (Mid 2011) Auto-Switching
iMac (Mid 2010) Auto-Switching
iMac (Late 2009) Auto-Switching
iMac (Early 2009) Auto-Switching
iMac (Early 2008) Auto-Switching
iMac (Mid 2007) Auto-Switching
iMac (Late 2006) Auto-Switching
iMac (Mid 2006) Auto-Switching
iMac (Early 2006) Auto-Switching
iMac G5 (iSight) Auto-Switching
iMac G5 (Ambient Light Sensor) Auto-Switching
iMac G5 (all models) Auto-Switching, except models sold in the US, Canada, and Japan (these models support 100-127 V AC).
iMac G3 and G4 (all models) Auto-Switching
Mac mini
Mac mini (Mid 2011) Auto-Switching
Mac mini (Mid 2010) Auto-Switching

Mac mini (all others)

Auto-Switching, except models sold in the US, Canada, and Japan (these models may support only 100-120 V AC). Purchase a power adapter from a local Apple-Authorized Service Provider if needed
MacBook Pro
MacBook Pro (15-inch) and later Auto-Switching
MacBook Pro (17-inch) and later Auto-Switching
MacBook
MacBook (13-inch) and later  Auto-Switching
MacBook Air
MacBook Air (Early 2008) and later Auto-Switching
iBook
iBook Auto-Switching
iBook (FireWire) Auto-Switching
iBook (Dual USB) Auto-Switching
iBook (Late 2001) and all later models Auto-Switching
PowerBook G3, PowerBook G4
PowerBook G3 (all models) Auto-Switching
PowerBook G4 Auto-Switching
PowerBook G4 (DVI) and all later models Auto-Switching
iPod
iPod (all models) Auto-Switching
iPad
iPad (all models) Auto-Switching
iPhone
iPhone (all models) Auto-Switching
AirPort Base Station
AirPort Base Station (Graphite) Preset: purchase a power adapter from a local Apple-Authorized Service Provider if needed
AirPort Base Station (Dual Ethernet) Preset: purchase a power adapter from a local Apple-Authorized Service Provider if needed
AirPort Extreme Base Station, AirPort Express, Time Capsule (all models) Auto-Switching
Last Modified: Sep 27, 2012
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  • Last Modified: Sep 27, 2012
  • Article: HT1981
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