Is there a way to make a bootable USB drive with the ability to install Mac OSx, Windows 7 and a flavor of Linus from it?
i understand bootable Mac OSx would only work on apple hardware, I also know that it is possible to make a bootable windows/linux usb drive, but could not find a way to also add Mac OSx
Sounds like you want a Hybrid MBR. May not work though, there’s a lot of issues with them.