Dual-Boot Windows 8.1 and macOS Sierra

Hello, so I want to install the macos sierra on my secondary HDD and I have some questions.

I have this:
Intel Core i3-2100
Asus P8H61-M LE
8GB Ram
AMD HD7750 Sapphire OC
1TB Seagate HDD with Windows 8.1 x64 (Legacy install)
320GB WD HDD with 53GB partition for macOS and 250GB for data
16GB kingstone usb 3.0 flash drive with macOS sierra and uefi clover

I just want to know if my data on the 250GB partition will be safe if I will install macOS on the 53GB partition.Also has anything changed since Yosemite?Can I just install it as the older os x without unpluging the windows drive?The only problems I had with similar dual-boots on this system was different time in windows after booting from os x and unbootable windows from bootloader but I dont remember what happened to the 250GB partition after installing Yosemite.

Thanks for replies.

Is your WD 320GB HDD formatted MBR or GPT+?
IF MBR, back-up data and reformat to GPT+ to install OS X.
If GPT+ already, just install OS X.

So I finally backed up the data from the WD 320GB drive but what is GPT+? In windows drive management there is only "convert to GTP type" option.Also should I choose UEFI or Legacy option in multibeast quick start?Or just try legacy if uefi will not work?

Update: So I tried to boot but there is only a blinking cursor after booting from usb drive.There is an UEFI usb drive option but when I try to boot it the screen just blink and nothing happens.I will try to create unibeast drive again with legacy mode later.

TheGeth said:

So I finally backed up the data from the WD 320GB drive but what is GPT+? In windows drive management there is only "convert to GTP type" option.Also should I choose UEFI or Legacy option in multibeast quick start?Or just try legacy if uefi will not work?

Update: So I tried to boot but there is only a blinking cursor after booting from usb drive.There is an UEFI usb drive option but when I try to boot it the screen just blink and nothing happens.I will try to create unibeast drive again with legacy mode later.

Click to expand...

Whether you choose Legacy or UEFI depends on how Win8 is installed if you want to boot either OS with Clover.
Boot Win8, click start->Run type msinfo32 and hit enter. Look at the resulting window - what BIOS mode does it list?

Going Bald said:

Whether you choose Legacy or UEFI depends on how Win8 is installed if you want to boot either OS with Clover.
Boot Win8, click start->Run type msinfo32 and hit enter. Look at the resulting window - what BIOS mode does it list?

Click to expand...

BIOS Mode Legacy

TheGeth said:

BIOS Mode Legacy

Click to expand...

Then you want to create your UniBeast USB installer for Legacy mode and you want to install Clover Legacy mode.
Note Clover's installer default is Legacy root if you do not customize. MultiBeast Clover Legacy installs Clover in the ESP (EFI System Partition)

So I tried it today with legacy clover on USB but I always get kernel panic after choosing to boot os x from usb.Default boot flags are dart=0 and nv_disable=1 but I also tried -v, -x and PCIRootUID=0.Result was always the same kernel panic text.I only added the Verde.kext to the usb efi but I dont think that this is the problem.What should I try now?

TheGeth said:

So I tried it today with legacy clover on USB but I always get kernel panic after choosing to boot os x from usb.Default boot flags are dart=0 and nv_disable=1 but I also tried -v, -x and PCIRootUID=0.Result was always the same kernel panic text.I only added the Verde.kext to the usb efi but I dont think that this is the problem.What should I try now?

Click to expand...

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There is no such thing as a Win 7 x64 Pro mainboard. Given i3-2100 CPU could guess a Z68 or Z77 board in which case answers would be different. If you have your hardware listed in one of your posts that does no good as I will not scrool back to try to find it - I do not have time for that.

nv_diasble=1 and PCIRootUID=0 are for nVidia graphics cards - why are you using them if you have the AMD GPU in your profile?
Your CPU does not support VT-d so dart=0 is also not needed.

You need to do some research and learn the relationship between your hardware and the boot-args you use.

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Going Bald said:

There is no such thing as a Win 7 x64 Pro mainboard. Given i3-2100 CPU could guess a Z68 or Z77 board in which case answers would be different. If you have your hardware listed in one of your posts that does no good as I will not scrool back to try to find it - I do not have time for that.

Click to expand...

Im sorry I didnt noticed that I had my old OS listed as my motherboard.I fixed it and here is a link to the manufacturer website https://www.asus.com/Motherboards/P8H61M_LE/overview/

Going Bald said:

nv_diasble=1 and PCIRootUID=0 are for nVidia graphics cards - why are you using them if you have the AMD GPU in your profile?
Your CPU does not support VT-d so dart=0 is also not needed.

Click to expand...

These were the default boot flags set by unibeast I think.I dont know why there is nv_disable but I also dont know what dart=0 was so I kept them.I added PCIRootUID because I found it on google but I didnt know that Clover always corrects it to 0.

TheGeth said:

So I tried it today with legacy clover on USB but I always get kernel panic after choosing to boot os x from usb.Default boot flags are dart=0 and nv_disable=1 but I also tried -v, -x and PCIRootUID=0.Result was always the same kernel panic text.I only added the Verde.kext to the usb efi but I dont think that this is the problem.What should I try now?

Click to expand...

OK, edit cofig.plist - make the only boot-arg -v for right now. Boot the system and post results. Also zip your config.plist and attach it.