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.
| Model | Power Supply type |
| 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 |