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dacreativeguy

macrumors 68020
Original poster
Jan 27, 2007
2,033
224
Anyone know if the new MacBook Pros can charge from an old Magsafe 2 charger? It is hard to tell from the photos, but the physical 3 and 2 plugs at least looks similar, as opposed to 2 vs. 1 which were totally different.
 

TylerL

macrumors regular
Jan 2, 2002
207
291
They are different dimensions. Also, MagSafe 3 likely communicates power needs and voltages via USB-PD and wouldn't speak the same protocol as MagSafe 1/2.
 

businessnumbersmoneypeopl

macrumors regular
Nov 24, 2020
144
297
I am still hoping in future adapter so I can still use my wonderful Apple Thunderbolt display 27 inches.
i have no intentions to throw it away

I came here to ask about this same issue – would anyone know about prospects for such an adapter? Would be great if someone would start selling one.
 

tmoerel

Suspended
Jan 24, 2008
1,005
1,570
I came here to ask about this same issue – would anyone know about prospects for such an adapter? Would be great if someone would start selling one.
That is very unlikely to happen as the new magsafe heavily relies on communication with the power supply as it is using PD3.1. Old power supplies cannot handle this communication and thus will not work. There is a video online somewhere where they take apart the new 140W power supply. There are special micro controllers in there for this communication.
 
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businessnumbersmoneypeopl

macrumors regular
Nov 24, 2020
144
297
That is very unlikely to happen as the new magsafe heavily relies on communication with the power supply as it is using PD3.1. Old power supplies cannot handle this communication and thus will not work. There is a video online somewhere where they take apart the new 140W power supply. There are special micro controllers in there for this communication.

Thanks for this insight! Too bad, but makes sense. I guess I'll just head out to buy an extra adapter then.
 

NewUsername

macrumors 6502a
Aug 20, 2019
591
1,323
I wonder if anyone (e.g. a YouTuber) tried to use MagSafe 2 on the new MacBook Pro or MagSafe 3 on one of the pre-2016 models? Seems like a fun experiment to me.
 

akbarali.ch

macrumors 6502a
May 4, 2011
834
745
Mumbai (India)
I am still hoping in future adapter so I can still use my wonderful Apple Thunderbolt display 27 inches.
i have no intentions to throw it away
I'm exactly in the same situation, been using Late 2013 MacBook pro with the ms1 to ms2 adapter. Now I have ordered 16inch M1 max, sadly now I will have to run one more cable to power it.
 

reukiodo

macrumors 6502
Nov 22, 2013
420
220
Earth
Magsafe 1 and 2 are electrically compatible, and Apple sells an adapter for them. A few others and I have had success physically modifying the end connector to work on both 1 and 2 without adapter. I have only modified MS2 connector to also fit MS1 by shaving the sides down. I have not yet tried modifying the MS1 connector to fit MS2, as it would require a lot more shaving of the top and bottom of the connector.

For MS3, I cannot tell if the 5 pins are the same size and spacing as MS1/MS2 pins. If I can source an MS3 charging cable for cheap, I will shave the ends to fit MS1 and see if a few different MacBooks can detect various chargers - Apple and non-Apple.
 

reukiodo

macrumors 6502
Nov 22, 2013
420
220
Earth
Looking at https://appleinsider.com/articles/2...test-macbook-pros-everything-you-need-to-know it seems that depth has also changed along with height and width.

If they are all electrically compatible, then it could be possible to have a single connector to fit all 3 styles.

I think shaving the MS2 cable connector to also fit MS1 (ends) and MS3 (top/bottom) would seem to be the least amount of effort overall, as it has barely enough depth to still make contact with MS1 MacBooks, while requiring less shaving to also fit MS3 MacBooks.
 

tmoerel

Suspended
Jan 24, 2008
1,005
1,570
Magsafe 1 and 2 are electrically compatible, and Apple sells an adapter for them. A few others and I have had success physically modifying the end connector to work on both 1 and 2 without adapter. I have only modified MS2 connector to also fit MS1 by shaving the sides down. I have not yet tried modifying the MS1 connector to fit MS2, as it would require a lot more shaving of the top and bottom of the connector.

For MS3, I cannot tell if the 5 pins are the same size and spacing as MS1/MS2 pins. If I can source an MS3 charging cable for cheap, I will shave the ends to fit MS1 and see if a few different MacBooks can detect various chargers - Apple and non-Apple.
That sounds like a pretty sure way to generate magic smoke. And if you are lucky it comes from the connector and not from the inside of the computer!
 

inane

macrumors newbie
Mar 12, 2022
3
0
I have a solution (that I haven't tested yet though):

a) There are Magsafe 2 -> USB C PD adapters, you can find them on Aliexpress and Amazon. These take the power from a Magsafe 2 connector, and provide DC/DC conversion to comply with the USB C PD standard. Commonly available versions are 65W or 45W.

b) I assume that the Magsafe 3 cable also works with 3rd-party power supplies, as long as they support the USB C PD standard.

c) The Macbook surely also supports charging over USB C, albeit at a lower power.


a+b or a+c:

... should be able to charge any Magsafe 3 or Thunderbolt Macbook with a power of 45-65W.

Note: There may be more powerful adapters available but I haven't explicitly searched for them.
 

kyjaotkb

macrumors 6502a
Nov 20, 2009
944
897
London, UK
 

jav6454

macrumors Core
Nov 14, 2007
22,303
6,264
1 Geostationary Tower Plaza
Anyone know if the new MacBook Pros can charge from an old Magsafe 2 charger? It is hard to tell from the photos, but the physical 3 and 2 plugs at least looks similar, as opposed to 2 vs. 1 which were totally different.
I wouldn't suggest you trying it. Possible different pin-out connections mean disaster in electrical terms should you try it.
 

reukiodo

macrumors 6502
Nov 22, 2013
420
220
Earth
Photos from my dremel modifications

One is a 27 LED Cinema Display MagSafe1 connector dremeled down the long sides to also fit into MagSafe2
The other is a USB C to MagSafe2 cable dremeled down the short sides to also fit MagSafe1

I've tested with MBA2009, MB2009, MBP2008, MBP2010, and MBP2015 and both cables work with all Macs.
e63779242c29afbe8dd233657e4dc7a1.jpg
461e992844989e204be9dcad773165d9.jpg
 

yonAtMacRumors

macrumors newbie
Apr 15, 2023
1
0
I have a solution (that I haven't tested yet though):

a) There are Magsafe 2 -> USB C PD adapters, you can find them on Aliexpress and Amazon. These take the power from a Magsafe 2 connector, and provide DC/DC conversion to comply with the USB C PD standard. Commonly available versions are 65W or 45W.

b) I assume that the Magsafe 3 cable also works with 3rd-party power supplies, as long as they support the USB C PD standard.

c) The Macbook surely also supports charging over USB C, albeit at a lower power.


a+b or a+c:

... should be able to charge any Magsafe 3 or Thunderbolt Macbook with a power of 45-65W.

Note: There may be more powerful adapters available but I haven't explicitly searched for them.
Hello, I have broke my MacBook Pro Retina 15" mid2015 power entry trying an MagSafe-2 to USB-C cable adapter. I use a "Satechi Desktop Charger Pro USB-C 108W - ST-TC108WM" an the cable adapter. It only seems to work when the MacBook was turn-off, otherways it was continuosly connecting and desconecting the power delivery(green-orange-green-orange-green- ....). With the MacBook turn-off it could be fully charge a couple of times, but my surprise cames when the original charger didn't light anymore and stop charging. Something inside the MacBook have been broken. I try to restore SMC, etc...but anything didn't work. Now I can only charge the MacBook when it is turn-off and with the cable adapter. I have to send to repair. My advise is not to use any 3th chargers with USB-C adapters. My question here is if this USB-C adapters can be used with the original MagSafe USB-C power chargers.
 

dmccloud

macrumors 68040
Sep 7, 2009
3,146
1,902
Anchorage, AK
Here's a side-by side comparison of the Magsafe 3(left) and Magsafe 2(right) connectors...

Magsafe 2 v 3.jpg

From the same page that came from, I found this tidbit:

Supporting PD3.1 is the biggest highlight. It can also be used with a third-party PD charger. Selling separately means that this cable may not only be designed for these two models.

I know from personal testing that the 14" M2 MBP can also charge over its USB-C ports via a USB-C charger that supports PD, so I'd assume that you could take the Magsafe 3 cable and use it with a third party USB-C PD charger as well.
 

reukiodo

macrumors 6502
Nov 22, 2013
420
220
Earth
While all MagSafe versions (1, 2, and 3) work with 20V USB C PD chargers and the proper USB C to MagSafe cable, the MS3 doesn't seem to be compatible with MS1/2 as not only is the length, width, and depth different, but sadly also the pin spacing as well, something Apple didn't need to do but did it anyway.
 

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blazerunner

Suspended
Nov 16, 2020
1,081
3,998
While all MagSafe versions (1, 2, and 3) work with 20V USB C PD chargers and the proper USB C to MagSafe cable, the MS3 doesn't seem to be compatible with MS1/2 as not only is the length, width, and depth different, but sadly also the pin spacing as well, something Apple didn't need to do but did it anyway.
Looks like the EU should have stepped in a long time ago and forced the change to USB-C and make it apply to laptops as well.

3 Different connectors... jesus. WHY?
 
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