Can any one give instructions how to set a Imac 2019 (model A2115) in DFU mode ?
I am unable to install any OS - after sometime it just comes an error during installation. Have tried different MacOs versions, all the same issue. And also using internet recovery on mac is not possible
Can anyone give input on this what should be done ?
[Re-Titled by Moderator]
Original Title: Imac 2019 A2115 - how to get to DFU
I'm not sure that is the problem..?
That requires a second equal or newer year model Mac and a USB-C cable.
see > How to revive or restore Mac firmware - Apple Support
What is the error message..?
What macOS version is iMac currently running..?
You may have some third-party AV, Cleaning or Optimizing software that is causing the problem.
To get around that, startup in Safe Mode and Upgrade/Update while in Safe Mode.
see > Start up your Mac in safe mode - Apple Support
For more info on if you get an error while trying to Upgrade/Update your iMac..
see > If an error occurred while updating or installing macOS - Apple Support
Startup in macOS Recovery as per > How to start up from macOS Recovery - Apple Support
Erase and format the internal drive as per > Use Disk Utility to erase an Intel-based Mac - Apple Support
Then Reinstall the offered macOS version as per > How to reinstall macOS - Apple Support
If you are using an Apple wireless keyboard, the keyboard will not be paired after erasing the iMac.
For that connect the keyboard to the iMac using the provided charging cable or use a generic USB keyboard.
The drive have been cleaned completely - no recovery available.
No matter what I try to install it showed this picture , after 10-15 minutes of installation. Also tried other macOS versions, but same happens.
[Edited by Moderator]
I cannot get the iMac show up on my MacBook 2022. I have selected the right USB-C port on the iMac(and for test also tried the other one). I know the USB-C cable support data, as I have used it with target disk mode.
When I release the power button the Mac startup up, with full fans - but as I Understand the DFU mode should appear before releasing the power button
All this is tried and done - and coming back to my initial question, was how to DFU the Mac as this is the last chance
These link provide how to do on MacBooks - I cannot see any instruction how to handle this on Imac
Scroll down to the "How to prepare a desktop computer to revive or restore" section of the article.
How do I set my 2019 iMac in DFU mode?
