The installation process alone takes around two hours.
Ensure you have plenty of free storage available on your device before you begin. You also will need around 15GB for your virtual machine’s hard disk. More recent versions of Mac OS X are not compatible.
ISO file that should be saved directly to your iPhone or iPad.
A copy of Mac OS X 10.5 Leopard (or earlier): We can’t tell you how to obtain this, but a simple Google search will.