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モデル番号A1706/EMC 3017ー2016年11月発売。この13インチのMac Book ProはOLED Touch Bar搭載です。デュアルコア"Skylake" Intel Core i5 CPUと4つのThunderbolt 3ポートが特徴です。

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Can you use a MacBook Pro with external SSD when internal SSD failed

I have a 13” MacBook Pro with TouchBar (A1706 with T1) purchased back in 2016.  It’s a great computer. A few weeks ago I made the mistake of knocking a glass of water over it.

At the time, I powered it off, removed the bottom case and dried it out.  One of the water detection stickers (on the left hand side when looking from underneath and screen on top) turned pink.

Later that day and for the next few days the computer worked flawlessly.

Over the course of the next week it would occasionally freeze and seemed to no longer be able to find the SSD (after it had booted).   This happened intermittently, but more frequently when powered by USB-C port.  At this time I did a SMC reset and NVRAM reset and it did not make any real difference. It was still able to boot and would still lose access to the SSD intermittently.

After about a week I decided to try doing another SMC reset and NVRAM reset to see if this would make things more reliable.   It did not, and now it will not detect the internal SSD at all.

I have entered Mac OS recovery mode, and it cannot find the SSD using Disk Utility, and downloads the recovery software over the internet.

Q1:  Is there a way to get the internal SSD operating again?  Feels like the MTBF was becoming more frequent over the first week and now it may be completely stuffed, but I am curious to know if there is a different set of settings I can try to get it up again.

I have purchased an external USB  SSD, and it would be great to be able to run the Mac from this.  Afterall the RAM and CPU still appear fully operational.  On the SSD I have installed Big Sur, and I am able to boot into safe mode from this drive.  However I run into the same issue many others experience where new firmware is required for the TouchBar and T1 chip.

Q2: Is there a way to use a MacBookPro with a non-operational internal SSD, but with an external SSD and boot from it?   How do I install the correct firmware onto the Mac?  The Big Sur installer does not have obvious firmware drivers.  The Catalina installer does, but appears to not be able to install these drivers (do they have to be installed on internal SSD)?

It would be great to continue to use the Mac for something!  Any assistance appreciated.

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Perhaps you need to https://support.apple.com/en-us/HT208198 enable external boot. Let us know

Turn on your Mac, then press and hold Command (⌘)-R immediately after you see the Apple logo. Your Mac starts up from macOS Recovery.

When you're asked to select a user you know the password for, select the user, click Next, then enter their administrator password.

When you see the macOS utilities window, choose Utilities > Startup Security Utility from the menu bar.

When you're asked to authenticate, click Enter macOS Password, then choose an administrator account and enter its password.

To allow your Mac to use an external startup disk:

Open Startup Security Utility.

Select ”Allow booting from external media.”

Your Mac doesn't support booting from network volumes, whether or not you allow booting from external media.

If you want to select an external startup disk before restarting your Mac, quit Startup Security Utility, then choose Apple menu  > Startup Disk.

さんによる

Thanks for the response. The Command+R when tried without the external SSD can only download the recovery mode tools from the internet. With the external SSD connected it can use the Big Sur version of the tools.

I used the Big Sur version, reinstalled the OS, but it then failed again at the usual place “A critical software update is required for your Mac…”

The issue really is, if the internal SSD is stuffed then can you boot from an external SSD and store the Touch Bar firmware on the external SSD.

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Side stepping your systems failure due to a liquid spill would not be wise! Clearly your flash storage got the worse of it right now over time other parts of your system will likely fail.

I would strongly recommend you get your system to someone who has the needed skills to fix your system. Time is your enemy! The longer you wait the more corrosion damage you’ll face.

If we look at what your logic board the two Yellow marked chips are your flash chips (SSD)

Block Image

They are very close to your right side Thunderbolt ports which puts the whole logic board at risk! Review the MacBook Pro 13" Touch Bar Teardown for more.

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Thanks for the feedback. Yes I used the tear down as my guide when I originally opened up the Mac to dry it out.

I took the cans off all the protected chips on the underside, and used a light setting on a heat gun on the top side (where the cans are not removable). I am fairly certain all moisture was removed.

What do you see as the cause of further corrosion?

I am based in NZ, and I am fairly certain there is no one here that does board level repairs on Mac PCBs, particularly for SMT chips. It has occurred to me that a capacitor or two could have gotten out of tolerance due to the water, but I am not sure how to track this down.

So while I am hopeful that there is a fix, I am resigned that this is probably a dead system. But would like to get something working long enough until the new M1 macs pros are announced.

さんによる

@mike - Unless it was distilled water, anything else has stuff in it! It's the dissolved solids within the liquid that does you in! Drying your system only removed the H2O part not the solids.

You're in luck! Contact Paul Daniels pldaniels@gmail.com he should be able to help you. He's in Australia and is highly skilled! To let him know we aimed you to him.

さんによる

@danj

For others information - Australia is 2000 Km from New Zealand or 3.5 hours flying and shipping is expensive.

さんによる

@aactech - Its just a hop, skip and a jump for me ;-}

Maybe you can locate someone more local. It's a lot closer than the US. I would still give him a try maybe he knows of someone in NZ.

さんによる

@mike

NZ board level repairs:

https://fix4u.co.nz/

Ask for a quote.

Hope this helps.

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I'm in a similar situation with a failed SSD on a 2017 Touch Bar Mac, and am running into the same "A critical software update is required for your Mac…” when installing MacOS (tried Big Sur, Mojave, High Sierra, all equal) on the external SSD, and thus can only boot in safe mode.

Did anyone find a fix for this? of how to get the Touch Bar firmware onto the Mac if that is what is causing this?

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@ihammerstrom - I don’t think you are facing the same issue here. This was a liquid damaged system.

Even though Mike had the same error his solution won’t be what will help you unless you too had a wet system issue as well.

Best to create your own question with all of your details so we can a set of fresh eyes which don’t get clouded from this dialog.

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mike さん、ありがとうございました!
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