New Macbook 3 pronged ac power cord

I just had my ac adaptor replaced under warranty. They sent me a 3 pronged power cord. Is this correct and they are just using a grounded cable now?

As far as I know, Apple includes 3-prong extension cables as well as the standard two-prong snap-in module in the box with all their new laptops. I got a 3-prong cable with my circa 2005 iBook G4 1.42, and I believe the ground pin connects to the metal "button" on the power supply.
Back in 2002, my iBook G3 600 shipped with a 2-prong extension cable. The "button" that the module snapped into was plastic.

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MacBook shuts off without power cord, even when battery is charged

I bought my MacBook in October. I've been treating it really delicately. But for some reason, it will not run without the power cord plugged in (as of yesterday morning).
If I pull it out, it shuts down. If I try to start it up without the cord, it shuts down. It gets about 2-3 seconds before it just shuts off. (It will run in sleep mode without the cord plugged in.)
And for a brief time yesterday evening, it worked without the cord plugged in.
This is my first Mac and I have no idea what is going on.

This is a recently common issue with Macbook Lith-ion batteries.
You have a defective battery, although AppleTech defines defective as a battery below 350 cycle counts. That's the lifetime of your $130 battery, which may average between 6-13 months depending on how you use it.
Some customers have had to buy 3 batteries in the past 2 years because AppleCare doesn't cover consumable items, eg. batteries.
check consumer comments at http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?fnode=h ome/shopmac/macaccessories/power&revw=MA561LL/A
I'm hoping Apple will realize that a $130 macbook battery with a 350 cycle count lifetime, doesn't live up to "Apple" standards. Lith-ion batteries are known to have a 2-3 year lifetime not 6-13 months.
Customers shouldn't have to purchase AppleCare only to realize they have to continuously purchase new batteries every 6-13 months.
This is truly a manufacturer defect in my personal opinion.

MacBook shuts off when power cord is disconnected

2007 White MacBook shuts off (not shutdown) when power cord is removed. Battery shows 98% charge. Any ideas? I plug AC power back in and it reboots when start button pushed. This problem just started tonight.
HELP!

Ronan... in your case, it looks like it's just time for a new battery. Your battery should hold a full charge for up to about 300 cycles. At that point, you should expect a decline in the charge capacity. As your battery has over 600 cycles, it sounds like it's had a good life. As you've had your MacBook for less than two years, it sounds like you are possibly using more cycles than necessary. You should try to use your MacBook while plugged in the majority of the time... but occasionally use it on battery (going through one or two cycles a week). A full cycle is a full charge and discharge. For example, if your battery is at 100% and you let it discharge to 90% and then you charge it back up to 100%, that is 1/10th of a cycle. You would need to do that 10 times to equal one cycle. If you started at 100% and let your battery discharge to 50% and then charged it up to full, that would be 1/2 cycle... doing this twice would equal one cycle. The number of cycles is the primary indicator of the life of your battery. It sounds like you are using your MacBook mostly on battery (with over 600 cycles in less than two years). After you replace your battery, try to run it plugged in for the majority of the time if possible. Many people are mistakenly under the impression that they should fully discharge their battery before charging it. This is not the case with Lithium Ion/Polymer batteries. This was the case with Nickel Cadmium or Nickel Metal Hydride batteries (much older rechargeable battery technologies). It seems many people still feel that the memory effect of the older battery technologies applies to newer battery technologies. Just the opposite is true.

My brand new Macbook pro can't power my USB Mbox 2 pro . Why not?

Can ANYONE help me because it seems like both APPLE and AVID can't. I just got a new macbook pro last month Aug/2011 just for audio and production. I installed protools 7.3 and when plugging my Mbox in the power lights on it are very dim and Protools says Unable to locate digidesign hardware. Can anyone tell me why this is happening and better yet how I can fix it? I tried diiferent USB cables, different USB ports, I tried connecting through an AC powered USB hub, I also have a crap PC on which the same software was installed and it works fine on that. Right now my mac OS is Lion 10.7.1.

Yeah, I just posted about the exact same issue. I have an Imac and another Macbook Pro and it works fine, just not on the mew Macbook Pro. I'm baffled, but intend to go to the Apple store to check this out. If I get anywhere, I will report back.

MacBook Pro crash when power cord is removed

When the power cord is disconnected the computer shuts off within about 0 to 15 minutes.
The log files do not show any fatal errors that have caused the crashes.
the only error that keeps repeating is: com.apple.launchd: (com.apple.launchd.peruser.32710[614]) getpwuid("32710") failed
However, i do not believe this would cause the crashes.
Any ideas?

Rebecca ...
Try Resetting the System Management Controller (SMC)
And check here > Apple Portables: Troubleshooting MagSafe adapters

Difference between 2 prong and 3 prong magsafe power cord

Hi,
My Mac Book pro 13 came with a 2 prong adapter. As the extra cable that hold the three prong plug adds extra weight to my briefcase am I safe and just fine using the shorter two prong plug adapter?
Whats the difference?
Thanks.

Of course not, both meet all the safety regulations of the countries they are intended for. In the event of faults (either house wiring or the magsafe itself) the 3 pin is safer (assuming that the location has a good, connected ground)

The power cord keeps falling of my MacBook Pro?

I love my new MacBook Pro but the power cord keeps falling off and it's driving me a little crazy. It's already been replaced once so that's not the problem. If anyone has any suggestions, besides duct tape, please let me know?

Denise, the new magsafe 2 has a weaker neodymium magnet, its designed that way.
formerly too many people in coffee shops etc etc were getting their macbooks yanked to the floor on accident.
Its new design is weaker for good reason.
if it keeps coming loose youre using if your lap or in bed,...sitting on a flat surface that woudlnt happen.

Incompatible older power cables with new MacBook Pro

New MacBook Pro has MagSafe power cord. I had 3 power cords for previous MacBookPro, at various work stations. Is there a safe adaptor available to convert old power cables for new MagSafe ports?

http://store.apple.com/us/product/MD504ZM/A/magsafe-to-magsafe-2-converter?fnode =51

What to do when the power cord does not connect to MacBook Pro?

This morning I went to turn on my MacBook Pro and the power cord is not "lighting up".

Try a different electric outlet.
Power
The MagSafe power adaptor LED doesn't appear to indicate the correct activity.
Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
If this does not help, you have to contact Apple.
A Mac comes with 90 days of free tech support from AppleCare from the date of purchase.
AppleCare: 1-800-275-2273
Best

2010 Mac Mini power cord loose? and Abode flash player bad??

Just received new 2010 Mac Mini 2 days ago. It looks different and better features than old Mini I had.
I am happy with newer Mini.
Problem: The power cord loose and not good plug in.
Need replace newer the power cord. Who I should contact to or go apple store to replace?
Anyone use Abode Flash Player version into my new Mini because I watch Hulu.com a lot. I read some forum here and bad news about Abode Flash Player. Is true?
Any suggestions.
Thanks

COME ON

Anyone know where I can buy the power cord for intel imac

i lost the power wire to my imac and i don't know where to buy it
anyone know where can I get it and how much it costs?

Newer iMacs use ordinary computer power cords commonly used on all sorts of electronic equipment.
The power cord used on G5 iMacs (I think) is different but is also readily available. Either one will cost you less than $10.

Power cord for Mac Book question...need some help

Hi...my Mom gave my niece her MacBook but kept the power cord. I bought one on eBay for her and it was a 60W MagSafe cord. She seems to be having power issues where it goes into rest mode while working on it and then takes a day or so to recover. Apple store checked it clean and installed Snow Leapord. Is it possible that she needs an 80W cable..I am not sure of the power requirements. Thanks

Have you tried a known-good Apple adapter with the machine?
I'd replace the adapter with one from Apple and see if the troubles persist.
~Lyss

I'm having multiple crashes on my new 5s. I can't connect to my Mac Pro!! Power cord broken. How can I fix this without connecting to my MacBook? Very frustrating and disappointing. Please help!!!

I'm having multiple crashes on my new 5s. I can't connect to my Mac Pro!! Power cord broken. How can I fix this without connecting to my MacBook? Very frustrating and disappointing. Please help!!!

Hi there Rlong50,
You may want to try force closing all open apps and resetting the device as an initial troubleshooting step. Take a look at the articles below for more information.
iOS: Force an app to close
http://support.apple.com/kb/ht5137
iPhone, iPad, iPod touch: Turning off and on (restarting) and resetting
http://support.apple.com/kb/ht1430
-Griff W.

Is there anyway to either trade in your old Macbook Pro for a new version, or get a new power cord when the old one has been damaged?

Well i was just wondering.. since i do have a older version of the Macbook Pro.. and the fact that the power cord has been damaged

You can always get a price on what an Apple affiliate would give you for your old MacBook Pro by going to http://www.apple.com/recycling/gift-card/faq.html and reading the instruction for the reuse program. Or you can sell your old one on eBay (that's what I did - you'll get more for it). Apple doesn't do a simple trade-in.
Your cheapest route is just to buy a new adapter. If you don't know which adapter to get, call Apple and they can tell you, or visit your local Apple Store. They're about $80.
Good luck,
Clinton

MacBook goes dead as soon as power cord is unplugged..time for a new battery or other problem?

For months now my MacBook has been iffy with the battery percentage. It will show 2hours then within the next minute 25 min then 10 minutes then it shoots all the way up to 3 hours. Now it won't stay on unless the power cord is plugged in...and says "not charging" at the top of the screen. Am I in need of a new battery? Or is it something else? Have never had this problem before...my MacBook is approximately 3 years old...

You are posting in an iMac forum. I'd recommend re-posting in the MacBook forum.

New Macbook 3 pronged ac power cord

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