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On my Macbook Air currently running Mac OS 10.13, I noticed that the size of individual disks don't add up to the total size, it's not even close.

Couple of months back I had installed 3 MacOS in different container, once I was done I erased them. Now I need to keep only one OS and extend it's size.

Why can't I see all disks here?

How do I extend the size of 'macOS-highSierra' to maxim possible?

Mac OS Disk Utility

keyur
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1 Answers1

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After much research and trial, I figured that extending a container wasn't possible. I had to backup the macOS-highSierra installation, then format the entire hard drive and restore the backup. I used Carbon Copy Cloner to create backup and restore.

keyur
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