Hackintosh the New-Way From Scratch

Under the General tab, enter the desired name for your VM and hit Next. Should you be using Clustering, pick your desired node.

Navigate to the OS tab and proceed to select the macOS ISO file in the ISO image field. It is imperative to ensure that the Type field is configured to Other.

Please ensure that the settings on the System tab correspond with the screenshot provided below to prevent any potential issues with your Windows installation.

Ensure that the Bus/Device option is set to VirtIO Block and the Cache is set to Default on the Disks tab to optimize performance. The Discard option can be selected to enable the Proxmox node to recover free space, which is analogous to the TRIM option for SSD drives. Input the necessary disk size and maintain the disk format as QEMU image format. Subsequently, click on the Next button.

In the CPU tab, indicate the desired number of cores and select the host CPU type. Note that the kvm64 CPU type may have restricted instruction sets, potentially causing sluggishness in certain scenarios.

Note: macOS will only accept cores; 1,2,4,8,16,32 natively. Anything else will make the VM not bootable.

On the Memory tab, allocate your desired Memory to for the VM, and untick Ballooning Device.
That assures that the VM has all the allocated Memory at all times.

Select the appropriate bridge for your VM on the Network tab and ensure that the model is set to VirtIO (paravirtualized) to optimize network performance on your Windows VM.

Please verify all settings and ensure that the "Start after created" option is not selected. It is necessary to include an additional DVD drive in our virtual machine to mount an ISO file containing VirtIO drivers prior to initiating the VM.

Once you've followed the previous steps, you should be left with something similar to this.

 In the Hardware tab, and then click Add to open a dropdown menu. Next, select the CD/DVD Drive option as shown.

Select the hsve-oc-boot ISO you downloaded earlier, and click Add.

If you've done everything correctly, you should be left with something similar to this.

Before we boot our VM, we need to make some adjustments to the Boot Order of the VM. Head into Options and hit Edit on the Boot Order.
Make sure to untick net0 and make sure the list corresponds as shown.

Head into the Shell and type in the following;
nano /etc/pve/qemu.-server/<vmid>.conf

<vmid> = the ID you gave your VM at the start.

Then we need do adjust some settings for our ISOs and add in an argument line for making macOS booting.

ide0 and ide2 will have media=cdrom in their lines, replace that with cache=unsafe as shown.

Your VMs Hardware tab should be looking similar to this, make sure it is before continuing.

Installing macOS

Just follow through the installer until you end up as shown on the next step.

First of I’d recommend turning on Local Scaling for getting the image resolution of the VM display scaled to the corresponding window size.
When you’ve done so, just hit Enter on the first entry in the Boot Picker, whichever macOS version you chose.

If the VM successfully booted up, you should be presented with this menu. Enter into Disk Utility.

Type in your desired disk name, I chose Macintosh HD.
Leave it as APFS and GUID Partition Map, and hit Erase.

Click the Apple Inc. VirtIO Block Media, and hit Erase.

When it's done, go ahead an Quit Disk Utility.

You can now continue to Install macOS.

Pick the drive you just erased for installing macOS onto.

You'll now have to be patient and let it do its thing, the installer do its thing.

Should you find it to be stuck at About 12 minutes remaining for too long, do check in on the CPU usage of the VM.

If the VMs CPU usage sticks to 100%, it's probably frozen. Hard Reset the VM to reboot, and it'll start over.

Once the VM has restarted after completing the first stage of the installing, you'll notice it's now saying macOS Installer.
Don't pick the installer with the macOS version logo (Install macOS <version>)!

It will now enter the second part of the installation, be patience and let it do its thing once again.
Do keep an eye out with the CPU usage as mentioned earlier.

The VM will probably restart a few times during the installation. Once it's done, it should now present you with the name of the disk you erased.
Enter it to start setting up your system settings and your user account.

Select your preferred region.

Skip this step.

Skip this step as well, you'll be able to sign in later on once you've made some changes.

Better to leave this unchecked for now, and enable it later. Select your preferred location manually by clicking on the presented map.