Looks like you can purchase a USB drive with the OS X El Capitan installer[0] from SanDisk(?) via Amazon. You can purchase Snow Leopard[0], Lion[1], and Mounta

Looks like you can purchase a USB drive with the OS X El Capitan installer[0] from SanDisk(?) via Amazon. You can purchase Snow Leopard[0], Lion[1], and Mountain Lion[2] directly from the Apple Store, but Snow Leopard looks like a DVD and Lion and Mountain Lion look like Mac App Store codes, and you'd need an existing macOS installation in that case. You can also purchase an OS X Lion USB installation drive[4] from Apple via Amazon. [0]: https://www.amazon.com/Capitan-10-11-Mac-Instruction-Included/dp/B015HCZDJS https://www.amazon.com/Capitan-10-11-Mac-Instruction-Include... [1]: http://www.apple.com/shop/product/MC573Z/A/mac-os-x-106-snow-leopard http://www.apple.com/shop/product/MC573Z/A/mac-os-x-106-snow... [2]: http://www.apple.com/shop/product/D6106Z/A/os-x-lion http://www.apple.com/shop/product/D6106Z/A/os-x-lion [3]: http://www.apple.com/shop/product/D6377Z/A/os-x-mountain-lion http://www.apple.com/shop/product/D6377Z/A/os-x-mountain-lio... [4]: https://www.amazon.com/Apple-Thumb-Drive-Model-A1384/dp/B0065V30NM https://www.amazon.com/Apple-Thumb-Drive-Model-A1384/dp/B006...