As of this bug report the only available livecd are from these dates both of which do not have EFI working in qemu (as tested ovmf) admincd-amd64-20170209.iso install-amd64-minimal-20170907.iso under catalyst the following error is displayed & gentoo.efimg.mountPoint does not get created inside of the image 20652+0 records in 20652+0 records out 21147648 bytes (21 MB, 20 MiB) copied, 0.0433322 s, 488 MB/s mkfs.fat 4.0 (2016-05-06) Populating EFI image '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/boot/System-gentoo.map' -> '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/System-gentoo.map' '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/boot/efi' -> '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/efi' '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/boot/efi/boot' -> '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/efi/boot' '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/boot/efi/boot/elilo.msg' -> '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/efi/boot/elilo.msg' '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/boot/efi/boot/bootia32.efi' -> '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/efi/boot/bootia32.efi' '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/boot/elilo.efi' -> '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/elilo.efi' '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/boot/gentoo' -> '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/gentoo' '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/boot/gentoo.igz' -> '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/gentoo.igz' cp: error writing '/var/tmp/catalyst/builds/default/livecd-stage2-amd64-latest/gentoo.efimg.mountPoint/gentoo.igz': No space left on device Removing /boot
(Very) Known issue, let's get discussion going on again over in bug 370331 *** This bug has been marked as a duplicate of bug 370331 ***