Creating a UEFI booting installation of RHL (on a Mac)

I'm installing RedHat Linux on my Mac Pro. I've found it won't boot to a USB OS installation stick, but, the standard RedHat DVD iso will boot, though only after a bit of coaxing, and waiting (and pulling all the possible alternative boot drive options from the machine) as Macs are natively EFI based machines, and will only boot in a legacy BIOS style after a longish wait, allowing them to support Windows.

Trouble is after going through the Linux install in that way, the installation that follows produces a legacy BIOS configured Linux installation - which is not what I want - I want it to be installed in UEFI mode, so that I can select it with an EFI-based Mac boot loader (in particular, Clover), in a triple or dual boot situation on my machine.

I don't have access to a modern UEFI-based Windows machine to do the installation there, and transfer it to my Mac. (I already tried installing on a BIOS-based PC I have here, and that results naturally enough in a legacy BIOS style Linux install, with no extra options being visible as far as I could see from the install that I went through on my Mac.)

I read in the DOCs that a UEFI RedHat Linux install needs a EFI boot partition, and a GUID partition map for the rest of the drive, and I prepared that for the drive I wanted to install Linux on on my Mac.

During installation, I chose manual drive setup, and selected the EFI partition I had created earlier, and set formatting of it to vfat, and manually added the other required partitions i.e. the /boot (not LVM) 4 gig, / (root) 60 gig LVM, /home 500 GB LVM, and swap 128 GB LVM, which all still resulted in a legacy booting system, not UEFI.

How can I tell the installer to create a UEFI Linux installation on my Mac (or anywhere for that matter), rather than a legacy BIOS one?