Questions & Answers for Apple 85W MagSafe Power Adaptor (for 15- and 17-inch MacBook Pro)

No. I just took mine to England where they also have 220s. There is a converter built in to the adapter already. You just need the right plug to snap on to the front.

• Answered by Meghan W
• 5/03/2010
• Flag as inappropriate

Yes you should be able to. apple chargers use smart charging technology and the macbook air will only take the power it needs.

• Answered by Brian H from Northborough
• 13/01/2011
• Flag as inappropriate

No. If you run some demanding software, it might not charge the laptop while you're using it heavily, but otherwise, it works fine with 60W adapters.

• Answered by Ed C from Palo Alto
• 28/07/2010
• Flag as inappropriate

Yes it will work because the model A1278 is a MacBook Pro 13-inch, and the 60W is the charger that comes in the box

• Answered by Mirna E from Sharjah
• 30/01/2012
• Flag as inappropriate

You will not need to use a converter, your MagSafe Power Adapter that came with your laptop will automatically regulate the 230-240 volt power that is common in the UK and throughout Europe. You will however need an adapter that will allow you to plug in your US three prong grounded plug into the standard UK 2 prong outlet. Always remember to plug the Apple MagSafe Power Adapter into the UK outlet prior to connecting it to your computer. It’s just a "good practice" safe guard against any power spikes before connecting it to your computer. I have lived in Europe, the Middle East and Asia for fir the last 5 years and have never had an issue when using the standard macbook pro power cord with the appropriate plug adapter for that region.

• Answered by Jess G from Houston
• 4/06/2010
• Flag as inappropriate

From Macworld Mag 2006:

If you hold the two power supplies side by side, you’ll notice that the MacBook Pro’s is larger. That’s because the MacBook Pro uses an 85-watt power supply, while the MacBook uses a 60-watt power supply. Apple says you can use the more powerful, 85-watt power supply with a MacBook without any problems, and that in 80 percent to 90 percent of situations, you can use the MacBook’s power supply with the more-demanding MacBook Pro as well. If you’re really taxing the MacBook Pro’s processor with some heavy-duty work, the MacBook’s adapter will still be able to power the MacBook Pro—but it may not have any power left over to charge its battery.

so, yes, contrary to what everyone else has said, you can.

• Answered by Wendy S from Montgomery Village
• 26/11/2009
• Flag as inappropriate

I tested it with my killowatt meter and read 0watts when macbook fully charged or unplugged.

• Answered by Clay S from Pyrmont
• 18/05/2011
• Flag as inappropriate

Yes, since they both draw 45 Watts of power

• Answered by Matthew S from Prince George
• 27/12/2011
• Flag as inappropriate

no this will not work with the 15" macbook pro with retina display because the 15" macbook pro with retina display uses more power so it requires a more powerful charger and also because the charging head is different on the charger for the 15" macbook pro with retina display since the body became thinner

• Answered by Salman S from Calgary
• 20/09/2012
• Flag as inappropriate

One is grounded and the other is ungrounded as you mentioned. I find that it is very important to use the three prong/grounded plug when ever you can, just because it is safer. The two prong is great for when traveling since you don't need to carry an extra 3 foot cable with you. Others and I have also found that the MacBooks heat up less when using the grounded cable.

The only real difference is convenience for the consumer.

Hope this answers your question.

• Answered by Matthew S from Prince George
• 1/10/2012
• Flag as inappropriate