Unable to set up Boot camp on my Mac running Monterey

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Unable to set up Boot camp on my Mac running Monterey

I'm trying to us Boot Camp Assistant (BCA) to set up Boot Camp but am hitting issues.

Running 12.7.3 on my 3.2 i7 Mini (2018), 64gb, 500gb SSD with 155gb free, AMD Vega Radeon 64 egpu. The SSD is APFS and only has one volume. Secure Boot is not enabled and Ican boot from external drives.

Trying to install either Win10 19H1 or 20H2 (have read conflicting reports on which is the last version to support egpu's).

If I run the BCA, it will download the Windows Support Software and then when it's trying to Partition Disk it errors with:

I booted into recovery mode and ran First Aid, the Data volume does error with:

I tried to run /sbin/fsck -fy (in terminal whilst in recovery mode) but that errors with:

warning: option -f is not implimented, ignoring

error: container /dev/rdisk2 is mounted.

I tried to run BCA in Safe Mode, but then it doesn't recognise either of my iso's.

Any advice.

[Re-Titled by Moderator]

Mac mini

Posted on Mar 5, 2024 11:23 AM

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Answer 1

Top-ranking reply

HWTech

Community+ 2026

Level 9

70,466 points

Mar 5, 2024 5:23 PM in response to think.different

Within Disk Utility click "View" and select "Show All Devices" so that the hidden Container appears on the left pane of Disk Utility. Run First Aid on the hidden Container to see if that will allow First Aid to fix the APFS errors. You may need to run First Aid several times in order to clear all the errors. If the errors are not cleared after several scans, then try running First Aid while booted into Recovery Mode, otherwise you will need to erase the whole physical SSD followed by reinstalling macOS & restoring from a backup.

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Answer 2

Mar 6, 2024 5:32 PM in response to think.different

I don't use Time Machine, but I I wouldn't expect you to have 23 snapshots. Most of the TM snapshots should automatically be deleted shortly after transferring the backup to external media, although I know at least one may be kept in order to allow a faster restore, perhaps even when the backup drive is not available.

You can use the following Apple article to view & delete APFS snapshots, but you may want to be cautious if the snapshot has not yet been transferred to external media:

View APFS snapshots in Disk Utility on Mac - Apple Support

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Answer 3

Mar 7, 2024 1:58 PM in response to think.different

If this error is not for a snapshot, then try repairing it while booted into Recovery Mode. If First Aid in Recovery Mode is unable to repair it, then the only option is to completely start over by performing a clean install of macOS by first erasing the whole physical drive followed by installing macOS & restoring from a backup. Unfortunately there are currently no third party utilities available for repairing an APFS volume. Alsoft, the developer of Disk Warrior is currently in the process of adding APFS repair support to their incredible app, but that may be some time before it is available.

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Answer 4

Mar 8, 2024 1:52 PM in response to think.different

No. At this time if First Aid is unable to repair the error, then wiping the file system & recreating it is the only way forward.....at least until Disk Warrior releases a new version with the ability to repair APFS volumes. IIRC, Alsoft developers only started working on APFS repair support some time last year. I wouldn't be surprised if it takes another year for them to finish since they do need to do lots of testing.

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Answer 5

Mar 18, 2024 11:51 AM in response to think.different

Just to update this. Decide to install Win10 onto an external SSD using these instructions: https://transferx23.medium.com/install-windows-10-on-an-external-hdd-or-ssd-with-boot-camp-under-macos-catalina-10-15-e0e315f2d48d

Works fine, just now trying to get my eGPU to work.

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Answer 6

Mar 6, 2024 1:04 PM in response to HWTech

All the errors (23 of them) seem to be related to TM snapshots:

Checking snapshot X of 23
(com.apple.TimeMachine.2024-03-06-135702.local)
error: directory valence check: directory (oid 0x3): nchildren (129) does not match drec count (128)

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Answer 7

Mar 7, 2024 1:13 PM in response to think.different

I've turned off TM (after TM had just finished a backup) and then used Terminal to manullay delete the 7 snapshots (command tmutil listlocalsnapshots /).

I ran first aid a handful of times again (in recovery) and now I'm getting just the following:

(...)
Checking the fsroot tree.
error: directory valence check: directory (oid 0x3): nchildren (66) does not match drec count (65) 
Checking the extent ref tree.
Verifying volume object map space.
The volume /dev/rdisk1s2 was found to be corrupt and needs to be repaired.
Verifying allocated space.
Performing deferred repairs.
error: Unable to perform deferred repairs without full space verification
error: Try running fsck against the entire APFS container instead of a volume
The volume /dev/rdisk1s2 could not be verified completely.
File system check exit code is 8.
Restoring the original state found as mounted.
File system verify or repair failed. : (-69845)

Operation successful.

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Answer 8

Mar 8, 2024 11:35 AM in response to think.different

My last post was after boot into recovery and running first aid a few times.

So there is nothing I can do in Single User Mode - my security policy is set to No Security in Startup Security Utility so I can boot to the command line.

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Unable to set up Boot camp on my Mac running Monterey

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