Disconnessione batteria MacBook Pro 16" 2019

Passo 1

Prima di iniziare, devi disabilitare l'Auto Boot del tuo Mac. Auto Boot accende il tuo Mac non appena apri il coperchio e può essere attivato accidentalmente in fase di smontaggio. Usa questa guida oppure segui le istruzioni abbreviate qui sotto per disabilitare l'Auto Boot. Questo comando potrebbe non funzionare su tutti i Mac.
Accendi il tuo Mac e apri Terminal.
Copia e incolla il seguente comando (oppure digitalo esattamente) in Terminal:
sudo nvram AutoBoot=%00
Premi [return]. Se richiesta, inserisci la tua password di amministratore e premi di nuovo [return]. Nota: il tuo tasto return può essere etichettato anche come ⏎ o "enter."
Ora puoi spegnere in sicurezza il tuo Mac e aprire la copertura inferiore senza accenderlo per sbaglio.
Quando la riparazione è terminata e il tuo Mac è stato riassemblato con successo, abilita nuovamente l'Auto Boot con il comando seguente:
sudo nvram AutoBoot=%03

Is this step necessary? I can’t perform this step as I am attempting to repair water damage and need to remove logic board & most likely replace the battery.

Macrepair SF - 02/07/19

@mac_medic You definitely don’t want the power coming on while the board is wet. In your case, I think powering on the machine to disable Auto Boot would do more damage than it prevents. I agree, skip this step and be prepared to disconnect the battery quickly if the laptop automatically powers on. Good luck!

Jeff Suovanen - 03/07/19

Thats right! You don't want power running while working on your logic board.

Dan -

This did not work when running High Sierra.

Kyle B - 22/10/19

Tried this on a 2018 MBP 13” Touchbar (there’s no iFixit guide for this model yet). Need to replace a broken screen.

Luckily I managed to connect to an external screen (Cmd-Down Brightness to switch displays) and enter above command. Seems to work, but there’s another problem with this model - it powers up as soon as any key is pressed……. ffs <gnashes teeth>

Cool_Breeze - 19/11/19

I unscrew the battery first and wrap electrical tape over the logic board battery connector before attempting any repairs to the board. Haven’t had any problems yet and I’ve worked on about 10 of these models already. Also when you open the bottom case use a suction cup at the bottom and pull up then run a plastic spudger along the edges to disconnect the clips. Also only use a plastic spudger on the board. Saw a youtube video from a repair shop and he did not disconnect the power and used all metal tools during the entire process of removing the board. His last step was to disconnect the battery terminal.

Brian - 07/02/20

Is this step necessary if my mac can turn on? Battery fully dead(

Nursat b - 26/08/20

BEFORE YOU START: The included torx head stripped off before I was done (and you might need an additional T4) so stop now and go buy a good one. Also they fail to warn you above to get some blue threadlocker ahead of time.

Jason Sherron - 09/10/20

This command did not work for me and I read that sometime in later 2020 Apple stopped this command from working…any ideas on a work around?

Patrick Machacek - 27/11/20

Not able to do that with damaged screen

richardjgreen - 15/12/20

If you have a damaged screen you can still use a converter from thunderbolt (USB 3) to HDMI and plug your Macbook Pro to your TV as monitor display. Just make sure to chose the right Source (HDMI IN) in your TV. I did it and to make it work I unplug and plug again in my Macbook and so I could disable the Auto boot

Roberto Sanchez Bustos -

Hi. This does not work on 2018 13” MacBook Pro with Touch Bar. I did exactly this to disable auto boot. But when I check by using nvram -p it says: auto-boot true. Am I doing something incorrectly? I did everything step by step. Copied and pasted the sudo command, pressed enter and then entered my password. I have Big Sur 11.1 installed. Is there any other way since I need to replace the screen. Thank you. Adrian

Adrian Vizik - 16/01/21

Hi everyone. This is also a little pointless if you can’t see anything on the screen, and you don’t have a display adapter to USB C to display it. I agree with Brian about removing the back and disconnecting the battery cable before you even think about opening the lid of the MacBook. Applying the insulation tape is also a handy little tip that just makes sure there is no way to discharge from either the board or battery.

Roberto Enrieu - 22/01/21

running `nvram -p | grep 'AutoBoot'` in terminal verifies that it was accepted

result: `AutoBoot %00`

Marek Polák - 01/02/21

Running Big Sur 11.6.7 on a 2019 16" MBP, it's "auto-boot". So it's: nvram -p | grep 'auto-boot' to display the current state, the default is true - and then to change it, sudo nvram auto-boot=false which turns it off.

Ed Mechem - 24/06/22

This step is completely unnecessary if you follow the guide to disconnect the battery properly. Just put some tape between the battery and logic board connection to prevent it from accidentally touching and therefore powering on the laptop.

Grant Ormsby - 11/03/21

It took me a few tries to make this command work, as I was able to copy and paste the command into Terminal, but could not type in my laptop’s password. I finally typed my password into a text document, copied it (command C), and then pasted it into Terminal and it worked.

tommy404 - 28/04/21

I didn’t do this. Mine never auto-booted before I replaced the battery. Now it does.

hatuxka -

BEFORE YOU DO ANYTHING - CHECK THE BATTERY!

I-fixit sent me a bad battery, which I didn’t realize until it was already install. They sent me a new one, but I wasted hours uninstalling and reinstalled.

Get a volt meter and measure the voltage on the output of the battery pack. If it reads 0 V, SEND IT BACK. It should read over 2 V.

bcardanha -

I've just received my replacement battery and it reads 0,042V between the two main connectors. Do you think it's dead?

peter sussex -

When I did this from Terminal.app within Recovery Mode, the “sudo” was not recognized but I could invoke it without the sudo part. It seems to have been accepted when looking at “nvram -p”

johann beda -

When in Recovery Mode, you already have superuser powers. So you don't need to prefix commands with the sudo command to invoke them with root privileges; you already have them. Do a pwd (print working directory) after opening Terminal in Recovery Mode, and you'll see that you're in the root user's directory.

Ed Mechem - 24/06/22

I received the battery kit for my 2018 MacBook Pro and as per the above comment from bcardanha - Oct 12, 2021, I checked the voltage on the pads marked + and - . It was zero volts so I panicked a bit.

I sent a message on the iFixiT Facebook page and I got no reply. I finally found the customer service email for Ifixit Europe and sent them an email voicing my concern as I was not keen to work for couple of hours just to discover that the battery is faulty. I had an almost instant reply on the email (kudos to them) and they adviced me to go ahead and install the new battery as the voltage measured when battery is not connected is not relevant.

I took a leap of faith and after two hours… the new battery showed 50% charge and everything seems to be working just fine. I am happy it worked.

Mircea Comanici -

After removing the old battery and installing the new battery I powered up the MBP before screwing the bottom on. I discovered the my keyboard would not function. It took a few hours of investigation and frustration that I discovered the track pad power ribbon had become partially dislodged from the trackpad. I was able to see that this through the little machined slot where the battery sat. I had to remove the trackpad to reinsert the power ribbon back into the connector in the trackpad. after reassembling and reinstalling the battery etc the keyboard worked. Just food for thought if your run into the keyboard issue.

Ed Mease -

This should be the default. IMO I tell you to power on - not the lid.

G Sena -

Est ce que cela fonctionne sur un macbook pro 2017 sans touchbar ?

maël muzelet -

Bonjour Maël, oui, ce tutoriel concerne "les MacBook Pro 2016 (et plus récents) et les MacBook Retina 12" 2017 (et plus récents)"

Claire Miesch -

Excellent instructions. I was able to follow and install the new screen. I recommend that you get a good set of tools before you begin. I started with an inexpensive repair kit bought online. The Penta and torx bits failed. I bought an IFIXIT kit with quality bits and I was able to do everything I needed.

Tom Markham -

If you're not running an admin account the sudo command won't work (which honestly, you should not be running admin). Rather than logging in to your admin amount via the OS, in the terminal type "login [admin username]," then the password and you'll be able to do the sudo command as described above. Once you're complete, type "logout [admin username]" and you'll be good to go. Obviously replace [admin username] with whatever the account name for your admin user is.

arichard2401 -

For those unable to complete this step because the screen is too damaged I recommend leaving your macbook on until the battery dies.

Nicholas R Licato -

Just replaced my 2018 15" MBP battery. Running Sonoma.
I found no way to disable AutoBoot (The status can be checked in the Power section of system report).

Anyway, i left my battery completely drain before opening the MBP, and had no issues during the process.

Cédric Bontems -

After sending this command in terminal when I checked what happens if I now open the lid, instead the screen lit slightly up (still black) then a battery symbol showing the charging state showed up.

Now, after replacement of the battery, this is all I get to see.

No reset of NVRAM nor PRAM helped.

Currently the new battery charges (58% atm) and it feels like it‘s mocking me.

webrockers -

I suspected the keyboard or TouchID sensor wouldn’t work, so I went on and checked every connector.

I missed connecting the left TouchID sensor from step 31.

webrockers -

Passo 2

Prima di iniziare, spegni completamente e stacca dall'alimentazione il tuo MacBook Pro. Richiudi il display e ribalta il laptop mettendolo a faccia in giù.
Usa un cacciavite pentalobe P5 per rimuovere le sei viti che fissano la cover inferiore, delle seguenti lunghezze:
Quattro viti da 3,7 mm
Due viti da 7,3 mm
Fai caso al fatto che le viti escono leggermente angolate: dovrai poi rimontarle nello stesso modo.
Nel corso dell'intera procedura, tieni traccia di ogni vite e accertati che ognuna venga rimessa esattamente dove è stata estratta per evitare danni al dispositivo.

Passo 3

Posiziona e quindi premi una ventosa vicino al bordo anteriore della cover inferiore, tra i fori delle viti.
Tira la ventosa giusto quanto basta ad aprire una piccola fessura sotto la cover inferiore.

Passo 4

Fai scorrere la punta di un plettro di apertura nella fessura che hai appena creato sotto la cover inferiore.
Fai scorrere il plettro di apertura attorno all'angolo più vicino e quindi fino a metà del lato del MacBook Pro.
Questa azione consente di sganciare la prima delle clip nascoste che fissano il case inferiore. Dovresti sentire le clip che si sbloccano.

I recommend being careful while sliding as you can scratch the speaker. The actual clip is about halfway up the side, whereas the speaker is closer to the front (further from the hinge). So stay very shallow with just the tip of the pick until you get halfway up the side.

Eric Gauderman -

Passo 5

Ripeti il passo precedente dal lato opposto, usando il tuo plettro di apertura per sganciare la seconda clip.

Same advice that I gave for the other side — be careful not to scratch the speaker which is close to the bottom. Keep the pick shallow until you get halfway up the side.

Eric Gauderman -

Passo 6

Solleva il bordo anteriore della cover (il lato opposto alla cerniera del display) giusto quanto basta per poter infilare la punta delle dita e avere una buona presa.
In questa fase si dovrebbero sganciare, se non l'hanno già fatto in precedenza, due ulteriori clip nascoste vicino al centro della cover.
Non alzare la cover più di 2-3 cm e non cercare di rimuoverla già ora.

Passo 7

Tira la cover inferiore con decisione per farla scorrere verso la parte anteriore del MacBook (allontanandola dal lato con le cerniere) per separare l'ultima delle clip che trattiene il case.
Tira prima da un angolo e poi dall'altro.
Tira in piano e non verso l'alto.
Questa azione può richiedere molta forza.

This was made a lot easier by using a lever in the hinge area in combination with pulling. The amount of force required was more than the grip I could get on the metal allowed for my macbook.

James Andariese - 22/04/21

Thank you for this comment! 🙏
For me it was the same way, wasn't able to get enough grip to pull sufficiently - but gently levering near the hinge with a spudger to "push" the bottom panel away worked well!

BavarianBamboo -

There is no pulling required. Use an opening pick or a spudger at the hinge area to gently and easily nudge the bottom panel off the clips. It should be effortless.

Marc Jacobson -

If you do pull on the bottom case be careful of where you place the hand supporting the Mac, otherwise you'll make a blood sacrifice to the Mac gods! I placed my other hand too close to the feet on the bottom case and while removing it, the sharp edge of the bottom case sliced into my thumb.

o355 -

Passo 8

Rimuovi la cover inferiore.
Per rimontare il case:
Disponilo in posizione e allinea le clip a scorrimento vicino alla cerniera del display. Premi verso il basso e fai scorrere la cover verso la cerniera. Lo scorrimento si dovrebbe arrestare non appena le clip si agganciano.
Quando le clip a scorrimento sono perfettamente agganciate e la cover sembra correttamente allineata, premi con decisione la cover stessa per agganciare le quattro clip nascoste. Dovresti sentire lo scatto quando le clip si bloccano.

Passo 9

Stacca e rimuovi lo sticker isolante che copre la scheda della batteria, sul bordo della scheda logica più vicino alla batteria stessa.
Se questa copertura isolante non si stacca facilmente, applica una modesta quantità di calore con un iOpener, un asciugacapelli o una pistola termica per ammorbidire l'adesivo sottostante e quindi prova di nuovo.

Passo 10

Stacca il nastro adesivo che dovrebbe coprire il connettore del cavo dati della scheda della batteria.

Passo 11

Usa uno spudger per sbloccare l'aletta di bloccaggio del connettore ZIF del cavo dati della scheda della batteria

Passo 12

Scollega il cavo dati della scheda della batteria facendolo scorrere fuori dal suo zoccolo sulla scheda logica.
Fai scorrere il cavo parallelamente alla scheda logica e non tirarlo verso l'alto.

들어올려서 떨어지면 어떻게 해야하나요…ㅠㅠ

obbamanse87 -

Passo 13

Stacca tutti i pezzi di nastro adesivo che dovrebbero coprire il connettore del cavo dati della scheda della batteria.
Alza e sblocca l'aletta di bloccaggio sul connettore all'estremità opposta del cavo dati della scheda della batteria.

Be very careful - the locking flap is very easy to break.

Vaughan -

I’ve seen versions of this battery board that the cable goes around and to the back of the board, so this step is not always necesary.

Carlos Morales -

Passo 14

Fai scorrere fuori dal suo zoccolo sulla scheda il cavo dati della scheda della batteria, quindi rimuovilo completamente.
Stai attento non rimontare questo cavo al contrario o capovolto.

I’ve seen versions of this battery board that the cable goes around and to the back of the board, so this step is not always necesary.

Carlos Morales -

Putting a mark on the cable will be helpful when reinstalling so you don't put it backwards or upside down.

maccentric -

This isn't necessary for many repairs, such as the Screen Replacement. I just lift the cable out of the way enough to do the next few steps and leave it attached.