OK, I know this is a huge imposition. But to make a long story long. I purchased a macbook air specifically for El Capitan. There was a hardware defect in the unit that did not allow it to be used. After a few repairs with the specific request that the OS not be changed, Apple removed the OS installing Sierra, which I cannot use with my printers. Problem is that after erasing the hard drive, the OS was not El Capitan but an earlier, buggy OS that's impossible to use. And since Apple no longer allows downloads for any OS other than the latest, I can't get El Capitan back and Apple won't provide it to me even though they should contractually. It was recommended that I find someone with El Capitan to make a bootable installer of the program for me. But I don't know anyone with El Capitan. Is there a kind soul out there who might be able to provide this to me in the holiday spirit so I can keep this machine?