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MP 1,1-5,1 Windows 11 on Mac Pro 5,1

macpro5

macpro5

macrumors newbie
Original poster
Sep 1, 2022
22
12
Is it possible to run Windows 11 on a 2010 Mac Pro? I have been using OpenCore, but I was told that Windows will try to write over the BootROM. Any help would be greatly appreciated.
 
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No problem at all. Create an install USB from ISO using Rufus (to disable TPM, 5,1 does not have this chip), start installation from OC bootpicker. Make sure you install to a different physical disk, in order to not destroy your MacOS.
 
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It is possible to run it in Parralels. Macs lack those hw features i always forget their names, Parallels emulates it.
 
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hwojtek said:
No problem at all. Create an install USB from ISO using Rufus (to disable TPM, 5,1 does not have this chip), start installation from OC bootpicker. Make sure you install to a different physical disk, in order to not destroy your MacOS.
Click to expand...
How do you proceed after W11 is installed? Do you install Bootcamp? I mean - is Bootcamp needed? Mine gives blue screen after bootcamp install…
 
I was able to install bootcamp 6.1, but with OC bootpicker, yeah, it's probably not needed.
 
Having recently reformatted my Windows drive and installed a fresh copy of Windows 11 Pro, I will reiterate what's been said in this thread:

If you are using OpenCore, you DO NOT need bootcamp or brigadier or parallels.

Follow the method outlined by @hwojtek above and you will be up and running in no time.
 
Last edited:
Hi all,
in which format must be formatted the target volume to receive Windows, while installing it from a USB drive created with Unetbootin (Universal Netboot Installer) ?
Format in MBR ?
Thx
 
I've got Legacy Windows 11 Pro running on two of my cMPs and both work without any issues at all. I'm using RefindPlus|OpenCore, and so boot natively to Windows (as opposed to those with windows EFI which you have to boot via OpenCore). I also use my Windows drive with Parallels 18 - no issues at all.
 
I'm having no luck with the above documented instructions. Depending on which set of instructions I find on MacRumors or elsewhere, I usually get partway through Windows 11 install before being given an error along the lines of Windows cannot reboot to begin the next part of installation. Telling me to try again.

I am using Martin Lo's package on my 5,1 and attempting to install Windows to a separate internal SSD. Could it be something with Martin's package causing me trouble? I'm new-er to the cMP side of things. Currently have a Mojave and a Big Sur installation on my machine.

I have tried to follow cdf's guide in the first post here OpenCore on the Mac Pro. But when it comes to the step "Enable the Driver" I cannot find relevant entries on my config.plist. Which makes me wonder if it is because I am using Martin's package 0.8.6 instead of the default OpenCore.

Any help or tips will be gladly welcomed!
 
Technics69 said:
I'm having no luck with the above documented instructions. Depending on which set of instructions I find on MacRumors or elsewhere, I usually get partway through Windows 11 install before being given an error along the lines of Windows cannot reboot to begin the next part of installation. Telling me to try again.

I am using Martin Lo's package on my 5,1 and attempting to install Windows to a separate internal SSD. Could it be something with Martin's package causing me trouble? I'm new-er to the cMP side of things. Currently have a Mojave and a Big Sur installation on my machine.

I have tried to follow cdf's guide in the first post here OpenCore on the Mac Pro. But when it comes to the step "Enable the Driver" I cannot find relevant entries on my config.plist. Which makes me wonder if it is because I am using Martin's package 0.8.6 instead of the default OpenCore.

Any help or tips will be gladly welcomed!
Click to expand...

See my post #12 above -- That should get you going.
 
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prefuse07 said:
See my post #12 above -- That should get you going.
Click to expand...
Yes, I gave that a try. While it did get me further than most, I still end with the same result of Windows saying the install cannot proceed because it was unable to reboot. I did find the info extremely helpful though!
 
Technics69 said:
Yes, I gave that a try. While it did get me further than most, I still end with the same result of Windows saying the install cannot proceed because it was unable to reboot. I did find the info extremely helpful though!
Click to expand...

You set up Windows 11 in UEFI formatted to GPT yes?

In Rufus, did you also make sure to check the box to disables TPM 2.0 and secureboot?

Did you make any modifications to your (Martin Lo) config? [see below]

I assume you enabled the Windows specific pieces, yeah? (per the Windows section in "the guide")

For example:

Code: 
<key>UEFI</key>
    <dict>
        <key>Drivers</key>
            <array>
                <dict>
                    <key>Arguments</key>
                    <string></string>
                    <key>Comment</key>
                    <string>Windows</string>
                    <key>Enabled</key>
                    <true/>
                    <key>LoadEarly</key>
                    <false/>
                    <key>Path</key>
                    <string>ExFatDxeLegacy.efi</string>
                </dict>
            </array>
    </dict>

and placing ExFatDxeLegacy.efi within the "Drivers" file within OC file...
 
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I know people have stated that it does not matter but pulling your other disks with OS X also helps.
 
prefuse07 said:
You set up Windows 11 in UEFI formatted to GPT yes?

In Rufus, did you also make sure to check the box to disables TPM 2.0 and secureboot?

Did you make any modifications to your (Martin Lo) config? [see below]

I assume you enabled the Windows specific pieces, yeah? (per the Windows section in "the guide")

For example:

Code: 
<key>UEFI</key>
    <dict>
        <key>Drivers</key>
            <array>
                <dict>
                    <key>Arguments</key>
                    <string></string>
                    <key>Comment</key>
                    <string>Windows</string>
                    <key>Enabled</key>
                    <true/>
                    <key>LoadEarly</key>
                    <false/>
                    <key>Path</key>
                    <string>ExFatDxeLegacy.efi</string>
                </dict>
            </array>
    </dict>

and placing ExFatDxeLegacy.efi within the "Drivers" file within OC file...
Click to expand...
I set up the Windows 11 USB in Rufus with UEFI and GPT, I also selected the box that disables TPM and secure boot.

I did not make any modifications to the Martin Lo config I'm using. Following the OpenCore guide, it says to replace part of the code with the part you listed above. Upon searching my config I find this under a portion of the UEFI segment. My coding skills are still very beginner level.

Code: 
<dict>
                <key>Arguments</key>
                <string></string>
                <key>Comment</key>
                <string></string>
                <key>Enabled</key>
                <true/>
                <key>LoadEarly</key>
                <false/>
                <key>Path</key>
                <string>ExFatDxeLegacy.efi</string>
            </dict>

Pre-Post correction. I see the error above (duh) I will correct it by typing "Windows" as the string. I almost erased my message but for clarity sake (and humility) I want to post. Thank you all, I will report back if I am successful!


Edit: After making the changes and physically removing all other drives except for my primary MacOS and the blank SSD for Windows I am getting the same error. The screen is in front of me now so I will type it exactly.

Progress begins but shortly after the installer states:

The installation was cancelled
Any changes made to your computer won't be saved.

With a small window overlaying that with the red X icon that says:
Windows could not prepare the computer to boot into the next phase of installation. To install Windows, restart the installation.
 
Last edited:
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Technics69 said:
I set up the Windows 11 USB in Rufus with UEFI and GPT, I also selected the box that disables TPM and secure boot.

I did not make any modifications to the Martin Lo config I'm using. Following the OpenCore guide, it says to replace part of the code with the part you listed above. Upon searching my config I find this under a portion of the UEFI segment. My coding skills are still very beginner level.

Code: 
<dict>
                <key>Arguments</key>
                <string></string>
                <key>Comment</key>
                <string></string>
                <key>Enabled</key>
                <true/>
                <key>LoadEarly</key>
                <false/>
                <key>Path</key>
                <string>ExFatDxeLegacy.efi</string>
            </dict>

Pre-Post correction. I see the error above (duh) I will correct it by typing "Windows" as the string. I almost erased my message but for clarity sake (and humility) I want to post. Thank you all, I will report back if I am successful!


Edit: After making the changes and physically removing all other drives except for my primary MacOS and the blank SSD for Windows I am getting the same error. The screen is in front of me now so I will type it exactly.

Progress begins but shortly after the installer states:

The installation was cancelled
Any changes made to your computer won't be saved.

With a small window overlaying that with the red X icon that says:
Windows could not prepare the computer to boot into the next phase of installation. To install Windows, restart the installation.
Click to expand...

And then once you reboot, are you stuck in a perpetual reboot loop? "To install Windows, restart the installation...." (over and over no matter what you do)
 
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