Problems formatting MacOS Catalina

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Level 1

8 points

Problems formatting MacOS Catalina

Hi, I am formatting my Mac due to upgrading to a new mac.

its a Macbook Pro 2015 with MacOs Catalina. I was following this apple post

https://support.apple.com/en-us/HT208496

my mac had 2 internal drives, Macintosh HD and Macintosh HD Data. I was not connected to the Wifi when I did this. I went into recovery mode (Command + R) , disk utility, selected Macintosh HD and as the tutorial says I selected to Erase Group. It went ahead and erased one of the HDs but not the other.

it gave me the error

The volume Macintosh HD couldn´t be unmounted because it is in use by process 708 (it was a slight different process before) (kextcache)

Couldn't be unmounted disk: (-69888)

Im stuck and don't know how to go forward, I tried to re-install the OS but it tells me its an incomplete system.

can someone help me?

thank you

MacBook Pro 15″, macOS 10.15

Posted on Jul 13, 2020 12:13 AM

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Answer 1

Best reply

matteol Author

Level 1

8 points

Jul 15, 2020 10:12 PM in response to Moreplavec

I actually found the answer. I googled the problem "the target volume is part of an incomplete system" and found that I didnt format the parent drive, because I had not selected >Disk Utility>View>Show All Devices. Found it here https://discussions.apple.com/thread/250872009

so after formatting the whole drive correctly I could re-instal the OS and now is working.

thank you

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Answer 2

Jul 13, 2020 6:06 AM in response to matteol

Hello,

I think there is only one disk. I have same stupid names while reinstalling. I just removed both "partitions" and suddenly it came up it's drive and partition. It shown pretty stupid way. So, remove it. What stays must by formatted and then you can install.

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Answer 3

matteol Author

Level 1

8 points

Jul 15, 2020 10:43 AM in response to Moreplavec

sorry but I dont really understand the solution you are proposing, I am not super good with tech.

when I try to instal catalaina I get the target volume is part of an incomplete system and cannot be installed to

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Problems formatting MacOS Catalina

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