All the articles are about how to create the bootable drive.ĭoes anyone know how to actually install the OS? Perhaps some command I can enter into the terminal at the Recovery screen? Google searches for ' install Mac OS from bootable drive' turn up nothing about the actual installation. When I do connect, I click try again and then a fail prompt comes up saying 'A required download is missing'. When I go back to the menu, and click 'Reinstall OS X', I get a prompt saying 'OS X can't be installed because you aren't connected to the internet'. When I turn on my iMac 2011, it takes me straight to the Recovery screen (because I previously Erased the main drive). However, now that I have the Bootable drive containing Mac OS El Capitan, I cannot find good information on how to actually install from it. I asked earlier about how to create a Bootable drive for the purpose of installing Mac OS on an older machine, and I received a great answer (thanks to Anderson).