To all of you that have enable the USB option on bootcamp on Macs with a built-in optical drive only to find this annoying error here is the solution:
It says Non system disk simply because bootcamp didn't create a bootable USB, bootcamp created crap that doesn't work what I did to sort this out was:
I used a computer with Windows 7 or higher (In my case at work)
I used DISKPART utility that comes with windows to make my 8 GB USB bootable, the way you do this is:
Insert the USB on the windows machine
Open the command prompt window
From here I'll write commands on italics and comments on normal
Type diskpart
It will ask you if you want to allow diskpart to make changes on this computer or some similar warning message you need to click yes.
Type list disk
It will show a list with the different disks, THEY WILL BE LISTED AS DISK 0, DISK 1, ETC.. identify your USB and see what number it is
Type select disk #
Obviously here you need to change "#" for whatever number your USB is, DON'T GET THE NUMBER WRONG OR YOU'LL BE FORMATTING THE WRONG THING.
Once the disk is selected type clean
That will delete all the partitions and info on the USB
Then type the following chain of commands:
create partition primary
select partition 1
active
format quick fs=fat32
assign
exit
All this will create a primary partition on your USB that will be bootable and will exit DiskPart, after this you only need to copy the files from your windows DVD or iso image into the USB and the bootable USB is ready to be used
Once you got your bootable USB you open bootcamp and untick the create a USB bootable disk and also the download the last software from apple, otherwise bootcamp will format again the USB and will undo all the work that you just did. Now I am assuming here that you already have modified the info.plst file on bootcamp to allow bootcamp to install from USB if you don't know how to do this let me know and I will explain it although it has been explained many times if you use google you'll find it.
After that bootcamp will ask you for the size of the partition you want to create, then it will create it, restart the computer and the computer will boot from USB and the windows instalation program will start.
That worked for me on a MacBookPro 15' with Yosemite Os X and while installing windows 7, I hope this helps other people but obviously do it under your own resposibility
Cheers Everybody
It says Non system disk simply because bootcamp didn't create a bootable USB, bootcamp created crap that doesn't work what I did to sort this out was:
I used a computer with Windows 7 or higher (In my case at work)
I used DISKPART utility that comes with windows to make my 8 GB USB bootable, the way you do this is:
Insert the USB on the windows machine
Open the command prompt window
From here I'll write commands on italics and comments on normal
Type diskpart
It will ask you if you want to allow diskpart to make changes on this computer or some similar warning message you need to click yes.
Type list disk
It will show a list with the different disks, THEY WILL BE LISTED AS DISK 0, DISK 1, ETC.. identify your USB and see what number it is
Type select disk #
Obviously here you need to change "#" for whatever number your USB is, DON'T GET THE NUMBER WRONG OR YOU'LL BE FORMATTING THE WRONG THING.
Once the disk is selected type clean
That will delete all the partitions and info on the USB
Then type the following chain of commands:
create partition primary
select partition 1
active
format quick fs=fat32
assign
exit
All this will create a primary partition on your USB that will be bootable and will exit DiskPart, after this you only need to copy the files from your windows DVD or iso image into the USB and the bootable USB is ready to be used
Once you got your bootable USB you open bootcamp and untick the create a USB bootable disk and also the download the last software from apple, otherwise bootcamp will format again the USB and will undo all the work that you just did. Now I am assuming here that you already have modified the info.plst file on bootcamp to allow bootcamp to install from USB if you don't know how to do this let me know and I will explain it although it has been explained many times if you use google you'll find it.
After that bootcamp will ask you for the size of the partition you want to create, then it will create it, restart the computer and the computer will boot from USB and the windows instalation program will start.
That worked for me on a MacBookPro 15' with Yosemite Os X and while installing windows 7, I hope this helps other people but obviously do it under your own resposibility
Cheers Everybody