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After trying hard to boot into my usb, it still won't boot. I have gone through the BIOS settings, checking them over and over again, then thinking it was the iso image on the usb I tried downloading other iso images but still no success. After further research, I saw that the Grub boot loader (my computer is set up to dual boot between Windows 7 and Linux Mint)sometimes is not patient enough to let the usb drivers start. If I am correct, please tell me how to make the Grub loader wait. I may also be way wrong, and if that is so, can I have some insight how to boot into a usb through Grub?
I have a Mac OS X image file on the usb. I am trying to install it to an external hard drive. I tried installing the iso through both the Linux usb image writer and Win32DiskImager on Windows. The USB is a Lexar 16 GB, and I have booted successfully from it many times with different versions of Linux, and a Windows 7 installer (before the GRUB boot loader was installed. I have also successfully booted the Mac OS X image before as well (although that was about two months ago).
If you have a bootable system on a flash drive, you would normally boot it by setting it to first boot priority in the BIOS and there would be no reason for Grub to be involved. That would be the standard method. You could put a chainload entry in your Grub menu but I don't know if that would work with a OSX image. What software did you use to get the image on the flash drive?
I think it is just the ISO image... I tested whether it was the grub preventing the boot by booting into a Linux USB flash drive and that was successful. Its not because of GRUB at all its because my Mac OS X image did not work. I used win32 as well as Linux USB image writer (comes preinstalled in Linux Mint). Is there any other imaging software I could use to write an image to a USB in Linux?
Is there any other imaging software I could use to write an image to a USB in Linux?
I doubt it. I expect you would need a MAC to do it although I've never tried. The quote below explain the problem briefly, this is from the unetbootin page and I expect other software for creating Linux Live USB would be the same.
Also, ISO files for non-Linux operating systems have a different boot mechanism, so don't expect them to work either.
The quote below is also from the unetbootin page so even if you used it to create the flash from the MAC iso it would not be expected to work. Don't know if other Live USB creators are the same but I would expect they are.
Note that resulting USB drives are bootable only on PCs (not on Macs).
If I have a bootable flash drive, (being any operating system, and it is guaranteed that it is bootable) will Grub get in the way of me booting into it, or the BIOS of the computer will take care of it? Based on the instructions on creating a bootable Mac OS X flash drive, I do not need to worry about unetbootin, I just restore the image to the flash drive. It may be my actual flash drive then, what types of flash drives are best for booting?
My earlier comments were in regard to trying to use software designed to create a bootable Linux Live medium to boot a MAC image. It won't work. If you have booted the flash drive on another system (like a Mac) and know it is bootable, you would need to set the flash drive to first boot priority in the BIOS. Grub is totally irrelevant and has nothing to do with whether you can or cannot boot the flash as Grub is on your hard drive not it the BIOS. You would be better off using an apple forum that discusses booting a Mac from a flash drive on a PC.