How to Merge Partitions / Volumes

I used a Mojave OS for about three months, then I decided to update to the Catalina OS. At the point of installation, I experienced a few challenges which made me partition the PC. Now I have installed the new OS, and at the same time deleted the old (Mojave) OS. But my PC is showing me that I have a total hard disk space of 60GB, instead of 128GB.


How can I merge the partitions together to have one disk size of 128GB?

MacBook Air 13", macOS 10.15

Posted on Oct 27, 2019 12:42 PM

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Question marked as Top-ranking reply

Posted on Oct 27, 2019 12:49 PM

At the point of installation, I experienced a few challenges which made me partition the PC.

You do not specify what these challanges were that lead to your present problem?



But my PC is showing me that I have a total hard disk space of 60GB, instead of 128GB.

And where are you reading this information?




Reformatting the parent drive from Internet Recovery>DiskUtility>View>Show All Devices

reformatting/initializing your physical drive—GUID/apfs this will erase ALL data.


Quit DU, re-install the macOS, restore your user data from a backup.


Recovery: https://support.apple.com/en-us/HT204904

How to use Time Machine to back up or restore your Mac: https://support.apple.com/en-us/HT201250




3 replies
Question marked as Top-ranking reply

Oct 27, 2019 12:49 PM in response to Segs007

At the point of installation, I experienced a few challenges which made me partition the PC.

You do not specify what these challanges were that lead to your present problem?



But my PC is showing me that I have a total hard disk space of 60GB, instead of 128GB.

And where are you reading this information?




Reformatting the parent drive from Internet Recovery>DiskUtility>View>Show All Devices

reformatting/initializing your physical drive—GUID/apfs this will erase ALL data.


Quit DU, re-install the macOS, restore your user data from a backup.


Recovery: https://support.apple.com/en-us/HT204904

How to use Time Machine to back up or restore your Mac: https://support.apple.com/en-us/HT201250




Oct 27, 2019 1:00 PM in response to Segs007

You do not specify what these challanges were that lead to your present problem?

Okay, so I kept having the error message "the selected volume is not APFS formatted" or something related.


And where are you reading this information?

Under disk utility. I could still see the first partition, and the new partition. It's just that the first is now empty.


Thanks for the assist

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How to Merge Partitions / Volumes

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