HamzaRB028 Author

Level 1

4 points

Macbook M4 stuck at Select disk screen

I erased and reset my Macbook Air M4 2025. After the "Activate Mac" screen, I clicked on Reinstall macOS Sequoia. However, it did not show any option on "Select the disk where you want to install macOS". I'm stuck on this screen. When I clicked back on Disk Utility and clicked on APPLE SSD AP0256Z Media, it did not show any Macintosh HD under it. When I try to click on the erase option, it also fails with the following message:

The volume on disk0 couldn't be mounted because it is in use by process 0 (kernel), which couldn't open device: (-69877).

It doesn't allow me to erase it. Please help.

MacBook Air (M4, 2025)

Posted on Dec 6, 2025 12:44 PM

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7 replies

Dec 6, 2025 1:44 PM in response to HamzaRB028

Rather than using the "Erase" option on that disk, try using the "Partition" option instead.

Partition the drive using the APFS Format, GUID Scheme and give the drive the name Macintosh HD.

If the partition process completes without error, then you can exit Disk Utility and proceed to Reinstall macOS.

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Dec 6, 2025 2:25 PM in response to HamzaRB028

Shut down the Mac, reboot in Recovery and try again.

How to start up from macOS Recovery - Apple Support

How to reinstall macOS - Apple Support

What macOS version was running on the Mac before you erased it?

Are you, by chance, trying to downgrade from macOS Tahoe?

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Dec 6, 2025 4:44 PM in response to HamzaRB028

A couple specific questions that may be relevant:

What macOS version did it ship with?

Has macOS 26 Tahoe ever been installed on this MaBook Air?

Are you trying to downgrade from a Tahoe installation?

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HamzaRB028 Author

Level 1

4 points

Dec 7, 2025 8:31 AM in response to D.I. Johnson

Literally, I did not check it macOS version before resetting. I bought it in September 2025.

Do you think the issue is due to the downgrade?

Suppose, if initially in Tahoe, why is it showing Seqiua after reset, becuase i did not downgrade it myself.

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HamzaRB028 Author

Level 1

4 points

Dec 6, 2025 2:05 PM in response to D.I. Johnson

When i clicken on partition, it doesnot allow me to add or change existing two partitions

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HamzaRB028 Author

Level 1

4 points

Dec 6, 2025 3:04 PM in response to D.I. Johnson

not worked

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HamzaRB028 Author

Level 1

4 points

Dec 6, 2025 3:05 PM in response to D.I. Johnson

I tried to reinstall using Configurator, but it again comes to the same screen.

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Macbook M4 stuck at Select disk screen

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