Boot into FOG on iMac 18,1 with Boot Image or boot Partition

[Quazz]

Don’t know if it’s changed since then, but https://forums.fogproject.org/topic/10615/ipxe-booting-possibly-broken-on-os-x-sierra-update/ seems relevant

[george1421]

@rtoadmin said in Boot into FOG on iMac 18,1 with Boot Image or boot Partition:

Unfortunatly there is no possibility to change the secure boot mode

I don’t understand??

Is there no option or turn off secure boot or is turning it off locked from changing?

[RTOadmin]

@george1421 Hi,
thank you.
Unfortunatly there is no possibility to change the secure boot mode. Only setting firmware Password is available.

[george1421]

@rtoadmin I was reading an article just recently (not sure why maybe because of this thread) and it mentioned something about secure boot. I thought at the time imac with secure boot that’s interesting… I thought that was a microsoft forced thing.

So from the menu you pick it but nothing happens. Check to see if secure boot is disable in the imac’s firmware. You will need to turn this off to image with fog anyway. See now when you pick the usb drive it boots.
https://www.wikihow.com/Turn-Off-Secure-Boot-on-Mac

If it doesn’t still work, I have a plan B.

[RTOadmin]

@george1421 Hi, thank you.

Yes the Macs are Intel based and bootcamp is working. The USB Drive is shown on the boot menu but wont do anything after selecting.

[george1421]

@rtoadmin Hmm that should work (I do have to say I’m ignorant to mac computers). The flash drive needs to be formatted as FAT32 format and efi\boot\bootx64.efi should be all that is needed. I know it works correctly on the Wintel based computers. Could you test that on a wintel based computer (windows and intel) to see if the usb drive is being seen correctly?

Understand FOG doesn’t fully support the ARM based systems just yet.

I do have an updated FOS Linux kernel that has support for the T2 chips patched in we can try once we get the macs to boot from the flash drive. If we can’t get the macs to see that usb drive (easy way) I’ll update an option 2 boot drive.

[RTOadmin]

@george1421

I did it like in the Tutorial but no boot drive would be shown. Only my to Partitions (bootcamp and mac os x).
Please see screenshoot.

[george1421]

@rtoadmin I can help with a few things. We do have a process to create a USB boot drive. I have a tutorial here: https://forums.fogproject.org/topic/6350/usb-boot-uefi-client-into-fog-menu-easy-way
This process is pretty easy. This is option 1.

Option 2 is to build a FOS Linux boot disk. This boot disk will boot directly into FOS Linux. You will not have some fog features, but the system will image.

With option 1 or 2 we still may run into a problem. The newer Mac computers have a security chip in them called T2. This T2 chip sits between memory, the CPU, and your storage media to manage data encryption. That T2 chip doesn’t get along with the linux kernel to well. There are some kernel patches that indicate they will work. I have an older one-off linux kernel with these T2 patches. I’m going to check to see if I can get them to compile into a contemporary linux kernel.

ref: https://wiki.t2linux.org/guides/kernel/