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Disk Utility Warning

so, this popped up while running disk utility in safe mode:


warning: apfs_num_other_fsobjects (55) is not valid (53)


while doing DI on the SSD, i recieved this,


Running First Aid on “APPLE SSD SM0512F Media” (disk0)


Checking prerequisites

Checking the partition list

Checking the partition map size

Checking for an EFI system partition

Checking the EFI system partition’s size

Checking the EFI system partition’s file system

Checking the EFI system partition’s folder content

Problems were found with the partition map which might prevent booting


Operation successful.


as well as on the external Hardrive:



Running First Aid on “Seagate BUP Slim BK Media” (disk2)


Checking prerequisites

Checking the partition list

Checking the partition map size

Checking for an EFI system partition

Checking the EFI system partition’s size

Checking the EFI system partition’s file system

Checking the EFI system partition’s folder content

Problems were found with the partition map which might prevent booting


I am running Mojave OS and i don't know what to do. Any help much appreciated.


P.S. THIS ONLY GIVES ME THE DISK UTILITY CORRUPTION WARNING IN SAFE MODE (why?)


Posted on Apr 17, 2020 7:16 PM

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Posted on Apr 17, 2020 7:24 PM

The firs one finished successfully. There is nothing to care about other than that.


My guess is the second error has to do with it being a Time Machine disk that it thinks has a bootable system, but it doesn't.

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