Tried to upgrade a Macbook5,1 using dosdude1's patcher. After High Sierra installation, booted back to installer USB drive, launched Disk Utility, converted Macintosh HD to APFS (it's a Samsung 850 EVO SSD), then launched "macOS Post Install" and applied the recommended patches including the APFS patch.
After rebooting to the SSD (Macintosh HD), the boot process is interrupted with a message "Boot file not found, exiting..." and the Shell> prompt.
The SSD is encrypted using FileVault, if it matters.
Any ideas?
Thanks
cinergi