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After upgrading to High Sierra on an 2011 MacBook Air, when running Disk Aid on the boot disk (auto-converted to APFS) I get this error:
error: snap_metadata_val object (oid 0xe79f): invalid extentref_tree_oid (0x0)
it still says the check completed sucessfuly, but this error looks not benign. I also booted in recovery mode and get the same error.
MacBook Air (13-inch Mid 2011), macOS High Sierra (10.13)
I have the same error as you. In my case it turned out to be a dateless time machine local snapshot.
To check for it, open a Terminal and list local time machine snapshot by running the
command "tmutil listlocalsnapshots /"
It will show entries like "com.apple.TimeMachine.YYYY-MM-DD-HHMMSS"
If you see dateless snapshot, delete it use "sudo tmutil deletelocalsnapshots YYYY-MM-DD-HHMMSS"
with the actual date of the dateless entry. You will need to enter your user password.
# tmutil listlocalsnapshots /
com.apple.TimeMachine.2017-10-04-014927 (dataless)
com.apple.TimeMachine.2017-10-04-024750
com.apple.TimeMachine.2017-10-04-024752
com.apple.TimeMachine.2017-10-04-024835
com.apple.TimeMachine.2017-10-04-024852
# sudo tmutil deletelocalsnapshots 2017-10-04-014927
Password:
Deleted local snapshot '2017-10-04-014927'
# tmutil listlocalsnapshots /
com.apple.TimeMachine.2017-10-04-024750
com.apple.TimeMachine.2017-10-04-024752
com.apple.TimeMachine.2017-10-04-024835
com.apple.TimeMachine.2017-10-04-024852
Please post the commands and outputs.
Yay, that was it for me as well. A dataless time machine snapshot. Thanks
Can you try run all commands as super user (root). I know the document does not states that.
Prepend all those tmutil commands with sudo, e.g.
sudo
You should write this command:
sudo tmutil delete 2017-11-27-194607
Thanks a lot for your help it worked for me too 🙂
Yep. - there was a dataless snapshot on my SSD that was causing disk verification to fail exactly as described. Removing is allowed the verification to complete. This with High Sierra 10.13.4.
I have found Disk Utility in 10.13.5 checks each snapshot in a way I haven't seen before. Fixed my errors automatically. Has Disk Utility been updated?
When I try:
tmutil listlocalsnapshots /
I don't get any snapshots.
thanks you. I resolve the problem with you process.
error: snap_metadata_val object (): invalid extentref_tree_oid (0x0)
