![]() ![]() Well, I sort of have a working Windows setup now. Also 10 year old article doesn't necessary tell correctly how to do things with newer os'es. No need to install from usb sticks, if that is causing trouble. Option to use option key is quite handy many times.įrom there you can install any (supported) macos version to ANOTHER (other macs: external, cMP: external or other internal) DISK. I's suggest that you first get yourself a gpu which will give you boot screen and then try again. ![]() I did not use "bootcamp assistant" since, IIRC, you cannot use it to install windows on a separate drive.Īnd I really didn't want mess up my macos bootdrive, which also does not have room for windows. filesystem has only info about itself ie. There has to be a system, which tells the computer what partitions the physical disk has and where they are located. It is a bit confusing, but think if you have 2 parititions in one physical disk. Then each partitions can have different filesystems and even multiple volumes. "Partition format" defines how partitions are handled in one physical drive. The 2012 MBPs are 9,x models.And maybe you should check if your windows drive still is MBR and not formatted to GPT ("GUID Partition Table"). You can verify your Model Identifier from How to identify MacBook Pro models - Apple Support. MacRumors has threads with PCI Register changes to expose the Intel GPU and the machine still runs hotter. Can it be done for older hardware, highly unlikely. If Windows can provide dual-GPU support (which they have) and also provide GPU-switching (missing), this can be done. Does Windows have the ability to switch GPUs? OS X, using external monitors, uses the non-Intel discreet GPU and the machine does not run hot. A non-EFI Hybrid MBR installation works correctly. If you force an EFI installation on a preUEFI Mac, you will see GPU and Audio errors. Thanks apple, if i knew that when i bought the laptop i would have gone with something else. the problem with doing this is that the more powerful gpu is all you can use in windows so the computer runs more hot and is louder which is annoying and hard on the battery life. the discreet gpu is hidden in the fake bios setup that bootcamp wants you to install with. apple is withholding the discreet gpu drivers from microsoft to trick people into thinking osx is more stable/efficient and thus windows cannot detect which gpu it is supposed to use when it can see both. bootcamp drivers are broken for windows 8.1 on an efi install. ![]() I hope this info will be useful for someone who googles the same problem! It's also worth mentioning that late-2013 rMBP (with TB2 and 750M) are UEFI 2.0 compliant and don't have this problem either (in fact their default bootcamp installation is using EFI mode!). I also read that Windows 8 doesn't have this problem (only 8.1). I'm surprised that newer BootCamp drivers don't work. This hardware setup is different from all other windows laptops that use optimus or whatever and looks like it requires special treatment. The problem originates from the Apple's proprietary mux + Intel iGPU which is no longer hidden from Windows by BIOS emulator (you can actually see it in device manager). I think that external SSD doesn't matter. Windows 8.1 installed in native EFI mode on an external Thunderbolt SSD (which is easier for me than messing up with the internal drive since Bootcamp won't install in EFI natively on my model) Anyway, I'm happy with what I got.īlack screen when booting windows 8.1 in EFI after installing NVidia 650M drivers. I tried several other drivers (native drivers from BootCamp and even, the latest driver from nVidia website) but they all gave me black screen. After experimenting today I finally discovered that the driver from Bootcamp ( link - Boot Camp Support Software, it contains a relatively old but still good nVidia 306.37) is the only one that doesn't give black screen on boot. ![]()
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