Hi I have windows 10 running in bootcamp on a external ssd drive. It booted fine in Parallels 12. Today I updated to parallels 13 and updated windows to latest creator update. Booting directly from the disk goes fine. When trying from parallels 13 I get: Boot Failed. EFI Hard Drive PXE.DHCP (Timeout 60s) Hope someone can tell me what to do, I do not Edit: Source Hard drive are correct. And there are two partitions on it, one bootcamp and one with osx High Sierra. Edit2: After seeing the https://forum.parallels.com/threads...orks-with-bootcamp-efi-over-usb-drive.341673/ tread I will inform about that I used this guid to install windows: (after trying many different guide, this was the one that worked for me). Had to use a different tool then Rufus, so I got a GUID partitioning that also worked with the OS X partition.
