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Hey there! I found out this forum thread due to looking for a solution to dual boot Windows 7 with MacOS 10.13.6 with OCLP 2.4.0 (open core) on my iMac 11.3 with patched vBIOS at AMD Fire pro M6100 GPU (stated in my signature).
I tried to install Win7 by the different ways using the OCLP recomendation and other methods, but everything hung on the bootloader splash screen "starting Windows". My last attempt was yesterday using the "windows install" app discussed here, after copying the win7.iso by legasy install - nothing to do... only after UEFI installation the computer recognized the WinOS installed on a separate HDD, but I still couldn't boot Win7, much less launch Boot camp to install the necessary apple drivers.
At the moment, I can't provide a log file, since I can't launch either WinOS or MacOS yet! Due to the black screen and periodic reboot... (various manipulations with the "option" key, ESC, command+R when starting the iMac don't affect the appearance of the OC EFI boot-screen or booting into recovery mode). In this way - will have to remove the SATA HDD to restore the functionality of at least MacOS at second SSD.
Please advise solutions for starting Win7 or other options for dual installation on different iMac drives with patched GPU like M6100?
Hello. The program does not affect macOS and OCLP when installing Windows, check, maybe you have problems with the disk. Try installing again with legacy boot, while OCLP must be excluded, and the disk on which you install must be an internal SATA (not USB). And I would like to see the log, I will be able to see whether the program installs Windows correctly.
 
Hello. The program does not affect macOS and OCLP when installing Windows, check, maybe you have problems with the disk. Try installing again with legacy boot, while OCLP must be excluded, and the disk on which you install must be an internal SATA (not USB). And I would like to see the log, I will be able to see whether the program installs Windows correctly.
@Sergey-Galan, Thanks for the answer!
yes, I will check the HDD for problems...
as I wrote above:
Windows legacy installation - not visible for OC-boot; so I immediately changed the installation option to UEFI, but apparently due to the lack of additional drivers - Win startup shows an abnormal termination and I tried to fix it with the help of the win-processor, but after winondows hung on this page and I could no longer load either winOS or MacOS (they are on different disks)
UPD: installer log file was made after Win-HDD SATA switch off
 

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First of all, many thanks to @Sergey-Galan for this great piece of software! I used it today to install the latest Windows 11 on my MacBookAir6,2, and it worked perfectly. Now I also have a Hackintosh running Sonoma alongside Windows 11.

Since your software makes it furthermore easy to back up a Windows installation, I was hoping to use it for periodic backups of my Windows 11 setup, similar to how Time Machine protects my Sonoma install. Time Machine has already saved me once when a cheap NVMe from AliExpress that was in my Mac previously died completely—so having the same kind of safety net for Windows would be amazing.

The problem I’ve run into is that my Windows partition (called System—see attached screenshot) does not appear as eligible for selection inside the Windows installer. Is there any way to make the app recognize it?

Thanks in advance!
 

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The problem I’ve run into is that my Windows partition (called System—see attached screenshot) does not appear as eligible for selection inside the Windows installer. Is there any way to make the app recognize it?

Thanks in advance!
Hi. If you disable Tuxera and remount the "System" partition, you will see the partition in the list, and you will be able to create a backup.
If you execute the command in the terminal: diskutil info disk4s2
Note disk4s2 is the "System" partition (as in your screenshot, make a change if this is not the case).
And provide me with the list, I will see how this program renamed the format name - by default Type (Bundle): ntfs, and in the new revision I will make a change after which Tuxera will not be an obstacle.
 
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Thanks for the quick reply. I did what you suggested, but still no luck—the partition does not show up in your application. I’ve attached the screenshot you requested.

Forget what I wrote, after relaunching Windows Install it is now shown. Thanks for the hint! So it was Tuxera NTFS blocking it after all.
 

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Thanks for the quick reply. I did what you suggested, but still no luck—the partition does not show up in your application. I’ve attached the screenshot you requested.

Forget what I wrote, after relaunching Windows Install it is now shown. Thanks for the hint! So it was Tuxera NTFS blocking it after all.
Please try the test version with the Tuxera NTFS program enabled.
 
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Please try the test version with the Tuxera NTFS program enabled.

I just did but unfortunately I can't select the partition while Tuxera NTFS is enabled. Attached please find the Terminal output of the NTFS disk with Tuxera NTFS on, perhaps that could help for future versions.
 

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This is true when installing Windows legacy boot; you can install Windows UEFI on the system disk, but you must provide access to the disk and/or disable SIP
If I’m doing the “Install Windows legacy boot” option in High Sierra, since there’s no separate “Full Disk Access” option in system preferences, is this my cue to disable SIP again? Thanks, Sergey.
 
If I’m doing the “Install Windows legacy boot” option in High Sierra, since there’s no separate “Full Disk Access” option in system preferences, is this my cue to disable SIP again? Thanks, Sergey.
Hi. When installing “Install Windows legacy boot” the disk should not be a system disk, as it should be able to be disconnected during the installation process. If necessary in High Sierra, disable SIP.
 
Hi. When installing “Install Windows legacy boot” the disk should not be a system disk, as it should be able to be disconnected during the installation process. If necessary in High Sierra, disable SIP.
Perfect, thank you. I tried doing it without disabling that and it simply wrote zero files to the drive and claimed the process was done. I guess that’s the problem.

EDIT: All right, never mind. Same problem as all the other ways I’ve tried. Black screen, flashing cursor. No matter what version of Windows, no matter type of ISO, no matter what method. I’m done. Thanks anyway, everyone.
 
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Black screen, flashing cursor. No matter what version of Windows, no matter type of ISO, no matter what method. I’m done. Thanks anyway, everyone.

This is a long known issue of some PC GPUs, if your GPU does not provide pre-boot configuration support with the MacPro5,1, you'll need to wait until Windows Update automatically downloads the GPU drivers, could take half an hour or even more.

You'll need to be directly connected to the internet via Ethernet, without any proxies and etc, btw.
 
This is a long known issue of some PC GPUs, if your GPU does not provide pre-boot configuration support with the MacPro5,1, you'll need to wait until Windows Update automatically downloads the GPU drivers, could take half an hour or even more.

You'll need to be directly connected to the internet via Ethernet, without any proxies and etc, btw.
Ah, I see. I have Microsoft’s update IPs blocked on my network. No wonder it never did anything no matter how long I waited. Guess that’s it, then.

EDIT: Hang on, I haven’t even finished setup yet. It doesn’t know how to connect to any networks near me. That can’t be it.
 
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