MacbookPro 9.1 OCLP Bootcamp method not working

[GH1852]

Ah ok I see. I will try legacy boot then but might not be on upcomming days though

I was thrown off by: "MacBook Pro (Retina, Mid 2012)" on https://support.apple.com/en-us/106412

Actually, Boot Camp 5 works with Windows 7 and 8. I'm in the middle right now of preparing the WinInstall USB using Boot Camp Assistant, and then see if everything is still good if I skip portioning the drive

 

[GH1852]

Ah ok I see. I will try legacy boot then but might not be on upcomming days though

I was thrown off by: "MacBook Pro (Retina, Mid 2012)" on https://support.apple.com/en-us/106412

I was able to create the WinInstall USB without doing any partitioning. I also feel that I should mention that one of the options when you open Boot Camp Assistant is "Download the Latest Boot Camp Drivers". If you check that box, it will then look for an empty USB to put them on. So you if you already have a Windows 10 DVD, an empty drive - MBR partition, ExFAT, these drivers are all you really in order to take care of the GPU, audio, trackpad etc. And the BootCamp Control panel

 

[jlnabais]

I don't have a DVD drive but I can see "Windows" on the legacy boot when I create a windows 10 from USB, I did that test before, so I am going to do it like that:
Use Bootcamp assitant on OCLP Seqoia check that, do the intall to pen (I'll use windows 10 version form the video you shared) ant I'll cancel the install on the partition window. Then I'll do the legacy boot install and see how it goes.

 

[GH1852]

I don't have a DVD drive but I can see "Windows" on the legacy boot when I create a windows 10 from USB, I did that test before, so I am going to do it like that:
Use Bootcamp assitant on OCLP Seqoia check that, do the intall to pen (I'll use windows 10 version form the video you shared) ant I'll cancel the install on the partition window. Then I'll do the legacy boot install and see how it goes.

If you are not planning to install using a DVD drive, there is no need to use the ancient version of Windows 10 referenced in that video. He only uses it to get it all to fit onto a single layer DVD. You can use a current release if installing from the USB

 

[GH1852]

If you are not planning to install using a DVD drive, there is no need to use the ancient version of Windows 10 referenced in that video. He only uses it to get it all to fit onto a single layer DVD. You can use a current release if installing from the USB

I don't have a DVD drive but I can see "Windows" on the legacy boot when I create a windows 10 from USB, I did that test before, so I am going to do it like that:
Use Bootcamp assitant on OCLP Seqoia check that, do the intall to pen (I'll use windows 10 version form the video you shared) ant I'll cancel the install on the partition window. Then I'll do the legacy boot install and see how it goes.

You said that you created a Windows 10 USB using Boot Camp Assistant, and then cancelled when the partitioning screen appeared, in the past. Do you still have the USB? If so, you don’t have to repeat the process. You could already have everything you need , including the correct version of Boot Camp software for Windows.

I still am surprised that any attempt at installing drivers for the iGPU ever occurred. Mac firmware disables that GPU when booting any other OS. Unless you only have an Intel GPU

 

[GH1852]

If you are not planning to install using a DVD drive, there is no need to use the ancient version of Windows 10 referenced in that video. He only uses it to get it all to fit onto a single layer DVD. You can use a current release if installing from the USB

I don't have a DVD drive but I can see "Windows" on the legacy boot when I create a windows 10 from USB, I did that test before, so I am going to do it like that:
Use Bootcamp assitant on OCLP Seqoia check that, do the intall to pen (I'll use windows 10 version form the video you shared) ant I'll cancel the install on the partition window. Then I'll do the legacy boot install and see how it goes.

You said that you created a Windows 10 USB using Boot Camp Assistant, and then cancelled when the partitioning screen appeared, in the past. Do you still have the USB? If so, you don’t have to repeat the process. You could already have everything you need , including the correct version of Boot Camp software for Windows.

I still am surprised that any attempt at installing drivers for the iGPU ever occurred. Mac firmware disables that GPU when booting any other OS. Unless you only have an Intel GPU. I have never seen my MacBook Pro attempt to install Intel HD 4000 while installing Windows, and I’ve done it about 6 times

 

[GH1852]

I don't have a DVD drive but I can see "Windows" on the legacy boot when I create a windows 10 from USB, I did that test before, so I am going to do it like that:
Use Bootcamp assitant on OCLP Seqoia check that, do the intall to pen (I'll use windows 10 version form the video you shared) ant I'll cancel the install on the partition window. Then I'll do the legacy boot install and see how it goes.

Sometime before you attempt to install Windows again, please check to verify that you haven't turned on something in OCLP. Open the app, and on the Extras tab, there's something called Windows GMux. It "exposes integrated graphics to Windows". Meaning Windows may try to install a driver for the Intel HD4000. It's not something that is useful or desirable for my laptop or yours. I've looked into it.

 

[jlnabais]

First of all thanks for all the help, time effort and patience @GH1852.

Windows GMux is off on OCLP I've confirmed and I rebuilt and installed it either way.

However I am trying your method, so I was able to use botocamp assistant on OCLP Seqoia Mac OS X and it did not error like the video at the end, I closed the window before creating the partitions from the setup.

I've booted using alt key to see the legacy bootloader and I can see "Windows" drive, I press it and then (at least for 40m) I get a never ending prompt. I leave screenshots, I've checked online and saw that some people say to select "EFI Boot" but that's what we are trying to avoid I guess. Have you ever seen this? I am using Windows 2h22 as you said USB could be with a newer version. Also the SSD where I want to install windows is ExFAT with MBR.

Thanks once more for your support.

EDIT: I selected "EFI Boot" on Legacy bootloader and I was able to install windows, and I can see it as a bootcamp partition on Mac OS X. However, I can't boot from it on the legacy boot I can conly see OCLP "EFI Boot" and "Mac OS X Disk" (screenshots bellow):

 

[GH1852]

I have seen the prompt for maybe 2-3 minutes, then Windows starts to install (when booting from Windows - NOT EFI). At this point, I really can't say what might be going on for you. I could recommend perhaps borrowing a USB external DVD drive and create a Windows DVD. But I'm not entirely confident that it would help- but it could. I've never had any such problems. Even when I did an EFI installation, things were OK except no audio, so I had to redo it correctly.

Another approach, since you are using a completely separate drive for Windows anyway, is to use a different way to install Windows. Some people have had good luck with a tool called RUFUS for creating bootable Windows 10 installation discs. All you are trying to do is do an old fashioned legacy installation of Windows, and then afterwards, install the Boot Camp software that you already have on your USB drive- in the Boot Camp folder. For your own sanity, I'd recommend keeping the WinInstall drive as it is and use a different USB stick for trying to create a new RUFUS drive. You need access to a Windows machine to run RUFUS and create a bootable USB. You can find lots of RUFUS instructions online.

It looks to me like, for some reason, your USB drive isn't actually bootable as a legacy installation disc. And I don't know why, sorry to say.

I hate to mention this, but I've been told that trying to run a MacBook Pro 9,1 with two internal hard drives by taking out the DVD drive can lead to all kinds of issues, especially with Boot Camp, and it really isn't recommended. I just went ahead and bought an SSD that was twice as "large" and used Boot Camp assistant exactly as in the video.

That's the extent of what I know. I truly don't know anything about Sequoia and Boot Camp.