Guide: Multibooting UEFI on Separate Drives

I would like to install macOS on my PC that already has installed Win10 on SSD and has other HDD drive for data (disk managment pic below).
This tutorial said that I need to create EFI partition on Win10 disk as the first partition on the drive and format the drive to GPT partition. Does it mean I need to delete and install Win10 again? My Win 10 are updated from Win 8 and I dont have key anymore.
Can I just unplug my Win10 and data drives, plug my third drive for macOS Sierra and do install macOS like on this tut https://www.tonymacx86.com/threads/...upported-intel-based-pc.200564/#uefi_settings
and later just plug other drives?

My PC is:
CPU: Intel Xeon 1231 v3 3.40Ghz
GPU: Palit Yetstream GTX 970
MPO: Gigabyte H97N
RAM: 16Gb DDR3 1600Mhz

Hi guys and @Going Bald, so i followed this step by step a few times, mac os always loads no issues using clover etc, it even shows the correct windows drive format for the win 10 install (does also so a legacy one) at first the win install went perfectly even checked via disk manage and system info both showed i was uefi mode but then once i plugged both drives in and set mac to be first boot etc the results are as followed: mac boots perfectly etc with only the new nvidiaweb (set to true) added to the config.plist. However the windows install if i select the uefi icon not legacy, the screen after 2 secs goes to stand by then if left alone 10mins later (time to type this post and make a cuppa) turns out of standby and boots/shows windows why is windows taking so long?

ps im sorry if this has been asked already but using my phone to type this.

bruno03 said:

I would like to install macOS on my PC that already has installed Win10 on SSD and has other HDD drive for data (disk managment pic below).
This tutorial said that I need to create EFI partition on Win10 disk as the first partition on the drive and format the drive to GPT partition. Does it mean I need to delete and install Win10 again? My Win 10 are updated from Win 8 and I dont have key anymore.
Can I just unplug my Win10 and data drives, plug my third drive for macOS Sierra and do install macOS like on this tut https://www.tonymacx86.com/threads/...upported-intel-based-pc.200564/#uefi_settings
and later just plug other drives?

My PC is:
CPU: Intel Xeon 1231 v3 3.40Ghz
GPU: Palit Yetstream GTX 970
MPO: Gigabyte H97N
RAM: 16Gb DDR3 1600Mhz

Click to expand...

Your Windows looks to be installed Legacy BIOS mode. Run msinfo32 to make sure BIOS mode is truly UEFI before proceeding.

Is there some sort of video tutorial for this by any chance? I'm currently on win10 and would like to be able to dualboot with Sierra, but for some reason I keep reading this guide over and over and I find myself pretty lost.

1)Do I have to do a fresh install of sierra over windows first and then reinstall windows in order to successfully accomplish dual boot?
2)In case I screw things up and my system becomes unbootable or whatever, can I always reinstall windows by plugging in the windows installation usb drive and reformat the whole thing?
3)What does "POST" mean when referring to this sort of things?
4)I read somewhere that nvme m.2 ssds are not supported, is this correct? Because I have an intel 600p nvme m.2 ssd for my windows and a 1tb hard drive for my light games/media.

kinda wanted to follow a video to the letter, but I don't really feel like doing some youtube one since I know here is where the true and updated info relies on. So if anyone knows a vid that explains all this that'd be awesome.

Thanks!

Hallo,
have 2 HD and I plan to have a 3 OS: Sierra, Windows 10 and Linux.
Actually I have Mac Osx sierra 10.12.4 on the SM951 boot HD, with clover partition.

I want to create 2 partition in 2nd HD respectively for Windows and Linux.
Is that possible or I need a cheap third SSD?
And I need an EFI partition for each OS?

Click to expand...

What you want to do is very easy, but you need to properly prepare your installation media for Windows and Linux - both installers must be for UEFI booting for Kaby Lake hardware.
Ubuntu is easiest because all you have to do is format the drive GPT and install Windows first, then select "Install alongside Windows" on the installation type screen of the Ubuntu installer - it will take it from there.

Going Bald said:

What you want to do is very easy, but you need to properly prepare your installation media for Windows and Linux - both installers must be for UEFI booting for Kaby Lake hardware.
Ubuntu is easiest because all you have to do is format the drive GPT and install Windows first, then select "Install alongside Windows" on the installation type screen of the Ubuntu installer - it will take it from there.

Click to expand...

What about installing only Ubuntu with mac OS? Would you want the same or separate boot drives?
Also, the initial post in this thread put the Ubuntu bootloader on the mac OS drive/EFI partition...why is that? Could you do it separately? Why or why not? What would change if you did (as far as Clover, etc.)?

Just a reference for my use: I'm looking to build my first computer over the summer: mac OS for fun and Ubuntu for reliability (come the school year when I'll need something to fall back on if the Hackintosh freaks out). Haven't bought anything yet, but I'm looking at an H170, i3-6100, and a GTX 710 (just because the HD 530 is such a pain). OS storage would be 1 or 2 SSDs (depending on the easiest and most reliable way to set this up, i.e. so that issues on the mac side don't screw up Linux). I've used Windows in the past, but am leaning away from using it now because of the price...$100 isn't really worth it to me.

I am also super new to this. I'm hoping that working through this process will teach me how this stuff works. Many thanks!

Sorry if I keep bugging you guys with posts, I just want everything to go fine.

I'm currently running only windows on my nvme m.2 SSD and use a separate HDD to store media. I now want to install sierra to the HDD and be able to dual boot win10 and sierra. In the event that everything goes flawlessly then I will get a new ssd and put sierra there and leave the HDD for storage. Couple of questions:

1) If I already have installed win10 on my pc as I said previously, I need to skip this, right? http://i.imgur.com/Mu57WHI.png... my currenty win10 apparently is installed legacy mode as shown in this pic: http://i.imgur.com/xHTGe7Y.png, but my MB (check profile) does support UEFI if I'm not mistaken.
2) If I do grab another ssd for sierra (in case everything works as it should), can I use one single HDD for storing media across both operating systems (I mean, can I access and write/read files to this storage HDD from both operating systems?).
3) If I already have win10, then all I need to do is this --> http://i.imgur.com/0lGA90s.pngand and select the HDD as my install drive and thats it? will clover detect both installations and let me choose what os to boot?
4)I heard recently the nvidia 10 series cards drivers where released, does that mean that everything GPU-wise will work fine, right?
5)Will I need to do anything for clover to detect my nvme m.2 ssd? It's an intel 600p if that helps.

Thanks and sorry once again if the above questions are sorta noob, I'm a complete begginer on hackintosh, but I'm certain I'll get it once I make my first successfull install.

Hi, can someone please confirm me that there is NO possible way to use Clover or Chamaleon to dual-boot Windows 7 x86 and OSX Yosemite, regardless of my BIOS settings? Do these bootloaders really work only with 64-bit Windows?

I have an Intel DH55HC motherboard with UEFI enabled (not at the time Win7 was setup, I think) and Windows 7 x86 + OSX Yosemite on separate SSD drives, yet neither of the bootloaders were installed. I've installed OSX twice, first choosing Chamaleon, then using Clover - neither of them ever showed up.

Currenty, I can only boot to OSX if the pen drive with OSX installer is plugged in, which is quite inconvenient. Thank you.

Going Bald said:

Your Windows looks to be installed Legacy BIOS mode. Run msinfo32 to make sure BIOS mode is truly UEFI before proceeding.

Click to expand...

Oh!!!

What to do?

I downloaded latest official windows 10 USB tool to create bootable USB.
and follow the thread.
The UEFI is not working.
I use Mac disk utility to format windows hard drive and exit

But windows 10 doesn't let me install....

any install process changed?

I set my BIOS to UEFI.
Do I need to change BIOS setting for each OS install?