bootcamp – Error whereas establishing home windows in my late 2014 iMac

The distinction is you are attempting to put in to the second HDD or SSD. The hyperlink you gave is for putting in to a Mac with a single inner HDD or SSD. The Home windows installer GUI shouldn’t be outfitted to deal with your state of affairs. One potential various can be to make use of the CLI to put in Home windows.

Notice: I’m utilizing the Home windows 10 20H2 English 64 bit model. In different phrases. the Home windows 10 October 2020 replace.

Ranging from the window posted as a picture in your query, proceed as follows.

1. Click on on the pink X to shut the window. Within the popup window, click on on the Sure button.

2. Enter the next instructions to begin diskpart and get an inventory of volumes.

   diskpart
   checklist quantity
   

3. Assign a drive letter P to the flash drive. Within the first command given under, substitute the # image with the quantity quantity for the flash drive given within the earlier step.

   choose quantity #
   assign letter=p
   

4. Assign drive letters to the EFI and Home windows partitions.

   choose disk 1
   setect partition 1
   assign letter=s
   choose partition 3
   assign letter=w
   

5. Enter the next command to give up diskpart.

   exit
   

6. This command applies the Home windows picture to the specified partition.

   dism /apply-image /imagefile:p:sourcesinstall.wim /identify:"Home windows 10 Professional" /applydir:w: /checkintegrity
   

   Notice: If you don’t what Home windows 10 Professional and have no idea the specified identify, then you may get an inventory of obtainable names by getting into the next command.

   dism /get-imageinfo /imagefile:p:sourcesinstall.wim
   

7. This command copies the drivers offered by Apple to the drivers retailer.

   dism /picture:w: /add-driver /driver:p:$WinPEDriver$ /recurse /forceunsigned
   

   Notice: This step searches for .inf information. If a discovered .inf file doesn’t lead to a driver being correctly copied to the motive force retailer, then an error message could also be generated. You’ll be able to ignore such messages. For instance, some drivers can solely be put in after Home windows has completed putting in.

8. Create the boot information. The command under installs for US English.

   bcdboot w:home windows /l en-us /s s: /f uefi
   

9. Shut the command immediate window and choose to Flip off your PC. In different phrases, shutdown the Mac.

   exit
   

10. Begin the Mac and proceed with the set up of Home windows. In the event you boot to macOS, then choose Home windows from the Startup Disk pane of the System Preferences utility.

11. When completed putting in Home windows, set up the Home windows Help Software program offered by Apple. Search for the Setup utility within the BootCamp folder on the flash drive.

12. From Home windows, run the Apple Software program Replace utility to get any Boot Camp and different software program updates from Apple.

Updating AMD graphics drivers for Home windows in Boot Camp

Apple has a web site Replace AMD graphics drivers for Home windows in Boot Camp which offers a hyperlink to the AMD web site homepage. Clicking on Drivers and Help takes you to a webpage the place there’s a Obtain Now button which is able to obtain software program to “Auto-Detect and Set up Radeon™ Graphics Drivers for Home windows®”. You too can choose your product from the checklist. In accordance with everymac your late 2014 iMac has a Radeon R9 M290X devoted video processor. Going although the checklist took me to the AMD Radeon™ R9 M290X Drivers & Help webpage. For the “Home windows 10 – 64-Bit Version”, there’s a obtain beneath the title “Auto-Detect and Set up”. This obtain is similar because the one discovered on the Drivers and Help webpage. There are additionally varied variations of the drivers you may obtain and check out.