Boot PXE on iMac 14.3 (catalina)

[Bristow 0]

Hello everyone,

As I work at a secondary school, I was able to get hold of some Catalina iMacs (iMac 14.3).
I already use FOG to deploy Windows and Linux images on PCs.

I would like to deploy a LinuxMint image on these iMacs.

However, I am unable to boot into PXE on them with FOG, and I do not know what is wrong.

I modified my DHCP server as follows:

## FOG
class "UEFI-32-1" {
match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00006";
filename "i386-efi/ipxe.efi";
}

class "UEFI-32-2" {
match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00002";
filename "i386-efi/ipxe.efi";
}

class "UEFI-64-1" {
match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00007";
filename "ipxe.efi";
}

class "UEFI-64-2" {
match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00008";
filename "ipxe.efi";
}

class "UEFI-64-3" {
match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00009";
filename "ipxe.efi";
}

class "Apple-Intel-Netboot" {
    match if substring (option vendor-class-identifier, 0, 14) = "AAPLBSDPC/i386";
    option dhcp-parameter-request-list 1,3,17,43,60;
    if (option dhcp-message-type = 8) {
            option vendor-class-identifier "AAPLBSDPC";
            if (substring(option vendor-encapsulated-options, 0, 3) = 01:01:01) {
                # BSDP List
                option vendor-encapsulated-options 01:01:01:04:02:80:00:07:04:81:00:05:2a:09:0D:81:00:05:2a:08:69:50:58:45:2d:46:4f:47;
                }
            elsif (substring(option vendor-encapsulated-options, 0, 3) = 01:01:02) {
                #BSDP Select
                option vendor-encapsulated-options 01:01:02:08:04:81:00:05:2a:82:0a:4e:65:74:42:6f:6f:74:30:30:31;
                # filename "i386-efi/ipxe.efi";
                filename "snp.efi";
                }
            }
        }

class "Legacy" {
match if substring(option vendor-class-identifier, 0, 20) = "PXEClient:Arch:00000";
filename "undionly.kkpxe";
}

### END FOG

I tested ipxe.efi in 64-bit and 32-bit, as well as snp.efi, but it still doesn’t work. I get some kind of spinning planet when I try to boot.

I admit I don’t fully understand the documentation page: https://wiki.fogproject.org/wiki/index.php/FOG_on_a_MAC

Thanks in advance!