Advice on partition setup

[dwf2008]

My PC currently has 3 hard drives:

 

Disk 0     4 Tb            4 partitions       Drives H, E, F, and G (linux)

Disk 1      150 Gb       2 partitions       EFI System partition and 148 Gb unallocated

Disk 2     1 Tb SSD    5 partitions       100 Mb EFI System partition, Drive C (Win10), 147Gb Healthy Primary Partition, 146 Gb Unallocated, 499 Mb Healthy Recovery Partition

 

I would like to install macOS, probably on Disk 2 in the unallocated partition.

Do I need to do anything to set up the partition before I run the OpenCore installer? Seems like I ought to at least label the partition for macOS and maybe format it.

 

Thanks

[Slice]

You will do formatting and labelling during installation but you have one possible difficulty. 

Disk for macOS must have GUID Partitions Table (GPT) and the table produced by Windows is not same as you need for macOS.

I may advice to reformat Disk1 to GPT using macOS installer -> Disk Utility inside it. 

[Don Freeman]

Thank you. Do I need to remove grub before I do the install, or will the installer take care of it?

 

[Slice]

14 hours ago, Don Freeman said:

Thank you. Do I need to remove grub before I do the install, or will the installer take care of it?

 

Format will kill any information on the disk. You may backup your grub and later restore it if necessary.

But its functionality covered by our bootloaders.

[mek21]

If your boot drive is GPT and you have GRUB2 installed on EFI partition you can chainload mac os via clover or open core from grub.cfg.  You can also load windows from GRUB2

 

grub.cfg examples:

 

menuentry "Open Core"{
    insmod part_gpt
    insmod chain
    search --no-floppy --set=root --fs-uuid (put open core partition UUID here)
    chainloader /EFI/OC/OpenCore.efi
}

menuentry "Clover"{
    insmod part_gpt
    insmod chain
    search --no-floppy --set=root --fs-uuid (put clover partition UUID here)
    chainloader /EFI/CLOVER/CLOVERX64.efi
}

 

Your mac os should be on a GPT formatted hard drive.

You can reinstall windows in EFI mode.

You can put Linux, Mac OS and Windows all on the some GPT formatted hard drive.

 

Windows, Mac OS and Linux can all be booted/chainloaded from GRUB2.

 

These examples assume you have an EFI BIOS and it is configured to boot in EFI and not llegacy mode.