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I have tested this and found the difference negligible. I posted results here when Win 10 came out when I was first person to install it on cMP.

Even my workstation PC runs in legacy mode and every component benchmark hits the manufacturer specification.

because PC has different boot rom, you change from legacy mode to uefi every time if you want, even when windows was installed 1 year ago, on Macs you need choose uefi before installation, so why bootcamp is recommended (because no direct access to boot room), bootcamp will choose uefi mode if it's possible for a suitable machine
 
because PC has different boot rom, you change from legacy mode to uefi every time if you want, even when windows was installed 1 year ago, on Macs you need choose uefi before installation, so why bootcamp is recommended (because no direct access to boot room), bootcamp will choose uefi mode if it's possible for a suitable machine

You can only convert the Windows install from legacy to UEFI with some hacks. It's not worth the effort. You aren't gaining any noticeable performance on such an old machine. Don't obsesses about nothing.
 
I was able to get the drivers installed and everything seems to be running ok. When I go to Device Manager its showing "Bluetooth USB Host Controller" as not installed. I tried running the "AppleBluetoothInstaller64.exe" from Bootcamp drivers 5640 but it says "Not Needed (No device update present)
 
I extracted "AppleBluetoothInstaller64.exe" with 7-zip and was able to install the driver. Once the drivers are installed and Bluetooth is recognized but the wireless mac keyboard loses access. If I disable the Bluetooth device the keyboard works. Anyone seen this before.
 
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Current Windows systems are fine with UEFI.

It's the bastard proprietary EFI that Apple uses that causes the problems.
Yes but he's asking if he should convert from Legacy to EFI on cMP. It's not going to make a difference performance wise and as you point out EFI mode won't bring the benefits that a real UEFI PC offers to Windows.
 
I extracted "AppleBluetoothInstaller64.exe" with 7-zip and was able to install the driver. Once the drivers are installed and Bluetooth is recognized but the wireless mac keyboard loses access. If I disable the Bluetooth device the keyboard works. Anyone seen this before.

Can you pair that again? I use wired keyboard, have no idea about the wireless one.
 
As long as I disable Bluetooth in device manager the keyboard works fine and since I don't currently need Bluetooth access from Windows I will save this fight for another day.
[doublepost=1503846719][/doublepost]The last issue I have is when trying to boot into Windows from MacOS. When I go into System Preferences - > Startup Disk and select "BOOTCAMP Windows" the computer will reboot but I get an error that says "No bootable device --insert boot disk and press any key" Normally I would not care and hold down the "Option" key and select "EFI Boot" for Windows but since I have a non-flashed GTX 1080 I can't see the startup screen. Any one have any suggestions?
 
Interesting, may be because we have difference BT card. My card is the BCM943602CS, which works perfectly with the 5640 Apple BT driver.
 
How do you figure out if you already have an install in UEFI mode? Was a while ago now but I'm sure I installed on an old Windows box, updated it fully and installed the bootcamp drivers and then just moved that to my Mac. If I can get better performance I might reinstall.


You don't need to reinstall. You can use Winclone to toggle between EFI boot and Legacy boot of your existing windows volume. Plus it really works great for creating backup images of your Windows drives.

Screen Shot 2017-08-30 at 10.15.36 AM.png
 
I’m hoping someone can help. I have a mid 2012 Mac Pro with the Radeon 5800 series graphics card. I installed Windows 10 on a separate hard drive but I’m having a couple issues:

Second monitor is in greyscale, Magic Mouse doesn’t scroll, and number pad on Apple keyboard doesn’t work.

I installed the correct drivers, BT works, sound works.

Any help would be appreciated.
 
I’m hoping someone can help. I have a mid 2012 Mac Pro with the Radeon 5800 series graphics card. I installed Windows 10 on a separate hard drive but I’m having a couple issues:

Second monitor is in greyscale, Magic Mouse doesn’t scroll, and number pad on Apple keyboard doesn’t work.

I installed the correct drivers, BT works, sound works.

Any help would be appreciated.

Did you upgrade the wifi/BT card?
 
No. I don’t believe so.

I believe the Magic Mouse scrolling need new BT driver. However, I only know this driver work for the BT 4.0 card, not sure if it’s OK for the original one.

The require driver is the AppleBluetoothInstaller64.exe, however, you need to extract it from the newer Bootcamp driver package e.g. version 5.1.5769, not the one that for cMP.

With this driver, my Magic Mouse can scroll in Windows. You may try it if you want to, but make sure you have a wired mouse around. In worst case, you can still use the wired mouse to roll back the BT driver.
 
The Magic Mouse works, just not scrolling. The second monitor works fine in macOS, and even when booting into Windows 10 (Microsoft logo is blue), but it then loses all color.
 
The Magic Mouse works, just not scrolling. The second monitor works fine in macOS, and even when booting into Windows 10 (Microsoft logo is blue), but it then loses all color.

Yes, I said magic mouse SCROLLING need the new BT driver. Magic Mouse works fine with the cMP bootcamp driver.

For graphics issue, do you install the latest driver from AMD yet?
 
Yes, I said magic mouse SCROLLING need the new BT driver. Magic Mouse works fine with the cMP bootcamp driver.

For graphics issue, do you install the latest driver from AMD yet?

Yes, seems to have issues. With all of these boot camp driver packages people suggest I’m a tad confused. Windows device manager doesn’t say I’m missing anything, just getting to the frustration level that it may not be worth all the hassle.
 
Yes, seems to have issues. With all of these boot camp driver packages people suggest I’m a tad confused. Windows device manager doesn’t say I’m missing anything, just getting to the frustration level that it may not be worth all the hassle.

You didn’t miss anything, that totally correct. However, the native Apple driver provide by Apple do not support Magic Mouse scrolling.

Also, a GPU driver is there, which also means you didn’t miss anything, but that version may be just too old and doesn’t work well.
 
You didn’t miss anything, that totally correct. However, the native Apple driver provide by Apple do not support Magic Mouse scrolling.

Also, a GPU driver is there, which also means you didn’t miss anything, but that version may be just too old and doesn’t work well.

I’m running dual 24” Dell monitors via mini display port. I’ve tried using a dvi and a mini display port as well but after a few minutes when booted into windows 10 one of the screens turns grayscale. I may try and swap out graphics cards to two of the 5700’s.

As far as the Magic Mouse not scrolling or wired keyboard number keys not working I’m at a loss. If the Magic Mouse scrolls on a Windows 7 install why would it not be able to on W10?
 
I just wanted to add some info for anyone trying to do this in the future:
I have a mid 2012 cMP 5,2 ... I have upgraded the processors to dual Xenon 5690 (3.5GHz) CPUs, 48GB Ram, Nvidia GTX 1080Ti and I just had a hell of a time getting windows 10 onto boot camp onto it.

Here's what worked (for me)...
A real Windows 10 install DVD (i used windows 10 home) -- no way a USB key would boot, plist hacks included. No way. Had to go DVD (others here seem to have success downloading ISO from microsoft and extracting to a DVD to boot into... not sure what format you'd burn the DVD as, perhaps just universal format... i'm not sure though, i had a real windows disk).

A separate hard drive not a partitioned one. I formatted it first in disk utility as Windows NT.

At first many install attempts failed ... until i removed all the drives EXCEPT that one blank NT drive, and then the windows dvd was able to install to it.

I just finished doing it again (this time onto a SSD) and realized THIS TIME i had 2 drives installed. my mac hd and my bland win HD. But I also realized that this was appeared on the device 0 bus! so that is ACTUALLY the key, (i was mystified by some users saying you don't have to remove drives and some saying you do, now having failed with other drives in, then removing them, then getting my win drive to install (it was the only one so of course it was device 0), then putting a mac drive back in, turns out with both drives in, the windows one is still dev 0 so it now works as an install target even alongside other disks. That's the key. Foolproof method: take your other drives out. Or if you can ensure your windows drive is device 0, then you won't have to.


after windows installed, just open your bootcamp folder you downloaded (onto a usb thumb drive or whatever) version 5.1.5621 as others have said, and run setup.exe ... for me it worked without fail. all installers ran automatically from that one script. Others have noted that if it fails you have to run each installer in each driver folder individually. I didn't. I just ran setup.exe and i'm up and running.

Good luck
Tom.
 
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I just wanted to add some info for anyone trying to do this in the future:
I have a mid 2012 cMP 5,2 ... I have upgraded the processors to dual Xenon 5690 (3.5GHz) CPUs, 48GB Ram, Nvidia GTX 1080Ti and I just had a hell of a time getting windows 10 onto boot camp onto it.

Here's what worked:
I had a real windows 10 install dvd. No attempts to make USB startup disks worked with my cMP as others have noted.
Eventually, despite successes others have had without removing drives, I had to remove my drives except for one dedicated one for windows in order to get past the windows 10 format / prepare to install. While other drives were present I could not get the win formatter to succeed. Once it finished though (with just one dedicate win drive installed), then it's fine to go back and put your mac drive(s) back in. Its something about the win installer not being able to get to/format the intended drive.

After all was said and done: the hard drives had to be OUT, and just one blank HD just for windows IN. and the dvd installer was the only way to do boot to the installer (most people seem to use extract ISOs of w10 and burn a dvd, but i had an original disc). And after windows boots up, you can run Setup.exe in your copy of the bootcamp helpers folder (download version 5.1.5621 from apple as others have noted here). That, for me, worked fully.

I did start out by editing my plist file to allow my version of bootcamp to create USB disks, but it really was for naught, since the cMP would not boot from that anyway, so don't even bother trying to boot from USB, it simply never worked for me. boot from DVD, install to blank HD, without any other HDs installed.

And good luck!
Tom.

I can confirm that download the ISO from MS and burn a disc also works fine.

In fact, I am the lucky one who don't need to pull out the HDDs. I don't know why, but I did it almost 20 months ago. By that time, I can simply run bootcamp to install Windows 10.

Anyway, some extra info for others. If anyone also installed the Wifi ac + BT 4.0 card. The drive for those card is actually inside the Bootcamp 5.1.5640 bundle. Without that, the BT should still work, but not at full function, device manager will show an unknown device, and Magic Mouse scrolling won't work as well.
 
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