

Failure occurs when any one of the conditions is ignored. The Boot Camp Assistant works under very strict conditions.
#Bootable usb tool for mac mac os#
If possible, I'd like to avoid updating to mac OS Catalina. I did a few more attempts (each time erasing and creating the bootcamp partition trying to create another USB tool), but always with the same result.Īny help in getting this to run is appreciated. In macOS the USB drive shows up without any problem.

The most promising attempt was the following: I did some research and it seems that ExFAT is not bootable? This resulted in the above error message. Tried to manually create the boot medium, using the above ISO-image, formatting the drive using ExFAT.This failed, because on the ISO-Image I have there is a file install.wim, which is too large for a FAT32-formatted drive. Tried to create a boot medium using Boot Camp assistant.The error message I get is No bootable device - insert boot disk and press any key. I'm trying to install Windows 10 in BootCamp on my 2012 Macbook Pro, running mac OS Sierra, but fail to boot from the USB drive on which the Windows install tools reside.
