Power consumption of these Macs is offset by our solar here so it would be great to put them to use somehow. I know these Macs are ancient, but I just can't bare to see them go to waste. I tried renaming the bootia32.efi file to boot圆4.efi also, but got the same result. After swapping out the file, GRUB drops into rescue mode and doesn't boot the FreeBSD boot loader and so clearly my knowledge about freeBSD is lacking. Using Sergey's blog as a reference, I thought I could swap out the boot圆4.efi file in the EFI partition with a bootia32.efi file that is used to boot Ubuntu 64bit kernel via EFI.

Naturally, the 32bit EFI of the Mac will not be able to execute this. If I choose EFI, a 64bit boot圆4.efi file is copied to the ~260MB EFI partition. So I have booted up via CD and the installation asks whether to setup the PATA disk as EFI for BIOS. I have used 's method to patch the FreeBSD 12 ISO so that it has MBR boot only, and so the MacPro does boot the CD installer using BIOS legacy mode.

This leads to all sorts of heat issues where other people on the net experience the CPUs halting to protect themselves.įor obvious reasons, I would much prefer to get EFI boot happening. I'm wondering if anyone is able to offer some suggestions:Ģ x QuadCore Xeon 64bit CPUs (have been upgraded)Īnytime the Mac boots using Legacy BIOS and not EFI, only 4 SATA ports are recognised, temperature sensors (and thus fan control) are not presented to the kernel correctly to be controlled.

Uefi emulator mac