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  1. I had the same issue...fixed it by keeping hfs+ instead of apfs. If you really want the apfs file format this will obviously not fix your problem. I Tried apfs.efi and apfsloader64.efi, but it never showed me the apfs partition, then tried the paragon apfs to hfs+ converter and manual repartitioning after the mojave installation, but it just corrupted my drive so it wasnt able to boot (Showed prohibitory sign). I then tried skipping the apfs conversion in the install-process via terminal (/Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/startosinstall --converttoapfs NO) but it didnt work because of an firmware error within my drive. BUT!...This installer made my day: https://www.insanelymac.com/forum/files/file/944-mojave-mbr-hfs-firmware-check-patch/ It skipped the firmware check so I was able to install mojave on my HFS+ SSD with the converttoapfs No