error: snap_metadata_val object (): invalid extentref_tree_oid (0x0)

Thank you!

This fixed the error and recovered 30G of hard drive space

You could manually become root by issuing the command "su -l" and entering your root password, and then try the tmutil command without sudo in front of it?

Great. Thanks for this, I found a dataless snapshot, deleted it and DiskUtility now runs clean.

Thank you

Thanks mate, worked. How on earth did you find out about this?

Use

tmutil delete 2017-11-27-194607

If you look at the suggested fixes, none include "com.apple.TimeMachine." in the tmutil delete command.

It worked for me when I omitted it, but tested with it included and got a similar error.

Appreciate the tip. It seems that with macOS X "another day, another defect". Mac OS 7.1 was a cakewalk compared to Mac OS X.

use following command :

sudo tmutil deletelocalsnapshots 2017-11-27-194607

Is different than tmutil delete 2017-11-27-194607 ?

Hi there, worked like a charm. Thank you very much!

I'm with you Javier, it reappears! Anyone know of a permanent fix, or even Apple?

🙂

I keep having this exact problem. Several times a week, I have to manually use tmutil to delete multiple dataless snapshots for Disk Utility to run successfully. We need a permanent fix.

Thank you! Fixed my issue too (BTW, as you put in the example, you only need to enter the date and number in the delete command, WITHOUT the com.apple.TimeMachine. :-D

🙂

The same thing keeps happening to me; several times a week, I have to use tmutil to remove dataless snapshots.

Any suggestion as to how to avoid these would be great.

-N

You're a god! Why can't Apple handle this (I don't know, maybe delete dateless snapshots? or give a useful message on the error)... shame.

Thank you very much!