Upgrade to Monterey and failed to boot(MacBook Pro (16-inch, 2019)

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qiliang1978 Author

Level 1

17 points

Upgrade to Monterey and failed to boot(MacBook Pro (16-inch, 2019)

Yes, I have another linux partition on the hard disk, and no local recovery partition any more.

Last Friday, I started to the upgrade to Monterey. After a reboot, it displays a folder icon with question mark, and "support.apple.com/Mac/startup" under it.

I have tried to boot with Option key, Cmd+R, it went to internet recovery, obviously, it can't load the partition for macOS(a 800 g partition) and "First Aid" failed for that partition(disk0s2) and same(disk2s2) for target hard disk mode when connecting it to another MacBook Pro(with ThunderBolt 2 cable+3->2 adapter):

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Running First Aid on “” (disk2s2)

Checking file system and repairing if necessary and if possible.

Volume is already unmounted.

Performing fsck_hfs -fy -x /dev/rdisk2s2

File system check exit code is 8.

Restoring the original state found as unmounted.

File system verify or repair failed. : (-69845)

Operation failed…

=====

Any hope to load the partition to get some data back?

It's my first time to fail to upgrade macOS in the last 5-10 years... I should not be that confident with Apple.

MacBook Pro with Touch Bar

Posted on Nov 2, 2021 6:29 AM

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Answer 1

qiliang1978 Author

Level 1

17 points

Nov 7, 2021 2:42 PM in response to qiliang1978

Woohoo! After a beer during night, I decided to have another try. After a bit google, I found pdisk and gdisk. And gdisk is really what I need, it has t function to "change a partition's type code", I change my partition from AF00 to AF0A, my partition is back!

* https://sourceforge.net/projects/gptfdisk/

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Answer 2

qiliang1978 Author

Level 1

17 points

Nov 6, 2021 11:57 AM in response to qiliang1978

I think I know why fsck_hfs got called instead of fsck_apfs.

=====

sudo diskutil list /dev/disk2

/dev/disk2 (external):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme 1.0 TB disk2

1: EFI ⁨EFI⁩ 314.6 MB disk2s1

2: Apple_HFS ⁨⁩ 749.0 GB disk2s2

(free space) 251.2 GB -

=====

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Answer 3

qiliang1978 Author

Level 1

17 points

Nov 7, 2021 4:03 AM in response to qiliang1978

Made a Ubuntu 21.10 USB bootable disk, it works fine with MacBook Pro 2015.

But on the broken MacBook Pro 2019 with T2(and Touch Bar), I can select the EFI Boot after Option boot, then it goes to black screen...

And Ubuntu 21.10 running on mbp2015 host, can't read Target Harddisk mode on mbp2019.

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Answer 4

qiliang1978 Author

Level 1

17 points

Nov 7, 2021 4:23 AM in response to qiliang1978

Is there anyone knows how to use diskutil or gpt or other tools on macOS to modify hard disk partition table, change the partition type from HFS partition to APFS Container? like fdisk/t things on Linux? Thanks a lot.

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Answer 5

qiliang1978 Author

Level 1

17 points

Nov 7, 2021 6:43 AM in response to qiliang1978

Thanks for Mike Boreham's suggestion.

I made a USB installer of Monterey. I can use it to boot into mbp 2019.

But it still considers that partition as a HFS partition instead of APFS containter. So not much difference with boot from Internet Recovery(Catalina).

* https://mrmacintosh.com/macos-12-monterey-full-installer-database-download-directly-from-apple/

* https://mrmacintosh.com/how-to-create-a-bootable-macos-12-beta-usb-drive-in-5-min/

BTW, This post synced with https://forums.macrumors.com/threads/upgrade-to-monterey-and-failed-to-boot-macbook-pro-16-inch-2019.2322174/

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Answer 6

qiliang1978 Author

Level 1

17 points

Nov 2, 2021 6:30 AM in response to qiliang1978

Have tried to call local telephone support yesterday, but didn't resolve yet...

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Answer 7

qiliang1978 Author

Level 1

17 points

Nov 7, 2021 4:01 AM in response to qiliang1978

Visited a local service provider yesterday, they can't give solution to fix it. Only said that I need to pay about 200$ to get the data back if possible.

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Upgrade to Monterey and failed to boot(MacBook Pro (16-inch, 2019)

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