Apple has released OS X Lion as a download from the Mac App Store only; however, you can use the download to create a separate OS installation disc or drive partition to use for troubleshooting ...

How to create a bootable USB installer drive for macOS Your email has been sent Your new Mac doesn't include an installation media. With the help of a GUI, Jack ...

So question for all you software guys, but if I wanted to make a thumbdrive that could run the installers for multiple OS's, can it even be done and how would I best go about doing it? What I'm ...