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High Sierra 10.13.6 Update fails, wrong format.

Currently running 10.13.4 and unable to update to 10.13.6. I have tried to install a few times now and never got a screen shot of the error. But remember it stating the drive is formatted wrong. I have included two screen shot of

my hard drive.


Yesterday I setup a new(used) MacBook and had fully updated to 10.13.6 and the did a Time Machine restore. The restore formatted the drive and created the same drive formatting.


Any thoughts?



User uploaded fileUser uploaded file

Posted on Aug 24, 2018 4:03 AM

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Posted on Aug 24, 2018 8:11 AM

Did you try updating your machine using the combo update? Download and install

Download macOS High Sierra 10.13.6 Combo Update



The second screen shot shows the drive is formatted as Master Boot Record? How is this bootable??


What you are looking for is:

GUID (GPT), extended journaled (HFS+)

2 replies

High Sierra 10.13.6 Update fails, wrong format.

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