Hello, I have USB flash 16GB. I want make 2 partition 8gb each and make Mac OS 10.11.4 boot flash on first partition and make Windows 10 on second partition. I make first partition for Mac OS JHFS+ and successfully boot USB flash. Second partition for Windows I make MS-FAT, but Boot Camp want write Windows on all flash, not second partition. How write Windows boot usb flash on second partition?
P.S. Sorry for my English.
To do what you are trying to do, I imagine you do not want to manually partition the flash drive. You would need to have one partition with El Capitan installed, boot from the flash drive and use Boot Camp Assistant to install Windows 10.
I should mention, even if you manage to squeeze both OSs on one 16GB flash drive, one, they will both be slow, and two, neither would have any free space left over to speak of so they would not run very well and you couldn't install much of anything in them. Maybe a 64GB flash drive would be better.
I Don't want install OSs он USB flash, I want make boot USB flash with which I can install the OS on my computer from this USB flash
I see. You would be much better off using two flash drives then. And I believe Windows 10 requires the flash drive to be formatted as an NTFS volume in order to create a Windows 10 USB installer.
Yes, I know that using 2 devices make it easy, and I know how it is. but I want one device costing. now I want to do it because it is interesting.
Well good luck. I don't believe you can do what you are trying to do.
Mac OS and Windows boot USB flash
