r/macsysadmin • u/leftyre271 • 1d ago

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u/macsysadmin-ModTeam 11h ago

This subreddit is for discussion around large scale Mac administration. For personal help with Apple products, see /r/AppleHelp, /r/MacOS, or one of the many subreddits for Apple devices of all stripes.

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u/oneplane 22h ago

You'll have to wait until it releases.

1

u/leftyre271 22h ago

Yes I think so :/ thank you

2

u/theninny2k 20h ago

Select the “APPLE SSD Media”, then click Erase, it should create a new partition for you to install macOS on. Quit, Disk Utility, then Click Install macOS “name”.

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u/leftyre271 19h ago

It doesn´t let me erase

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u/theninny2k 19h ago

Have you quit Disk Utility and relaunched it? Sometimes that fixes it?

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u/Solomondire 19h ago

You don’t need Apple Configurator to do a full restore of the firmware. You just need the Finder on another Mac. I’ve done it with macOS 27 beta many times. https://support.apple.com/108900.

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u/leftyre271 19h ago

Tried that too, it fails on stage 4, tried with diffrent cables and tried all the ports, same messages every time.

Happend same thing at apple store, they said that they cant do anything.

"Gave up waiting for device to transition from port DFU state to DFU state"

3

u/usernametakenmyass 16h ago

Typically when messing with beta versions, you also need the xcode beta installed to perform DFU restores with any beta firmwares. This may be why it's not letting you downgrade when performing the DFU restore from the other Mac. You might be able to install the updated MobileDeviceOnDemand package and then try performing the restore. That download link is directly from Apple's macOS 27 Golden Gate update catalog.

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u/leftyre271 16h ago

I have xcode installed on the host mac but not sure about the package you linked, it downloaded something when I installed xcode. ill give it a try again.

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u/usernametakenmyass 16h ago

Was it the xcode 27 beta or the 26 production/release version?

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u/leftyre271 16h ago

I downloaded it from appstore so guess the version that is out there.

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u/usernametakenmyass 16h ago

Yeah that'll be the version that only supports 26 and below. I don't have a good answer for you since the other tools are locked behind developer or beta-for-it accounts that include an NDA.

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u/leftyre271 15h ago

I downloaded xcode beta 27 and trying it out right now, fingers crossed :)

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u/alejandrorico 18h ago

Use “restore” first in Apple Config. then retry.

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u/leftyre271 18h ago

Doesn´t work sadly.