Its a really long story. Right now I have a Macbook Pro with a formatted HD. I was able to get everything off it I needed by putting the HD in a external case and connecting to my iMac. Before I tried downloading El Captain through recovery mode and it failed every time. I tried installing the OS from a Snow Leopard Disc I had and that failed. Then I tried with the OSX disc that came with the MBP when I bought it several years ago new and that failed. My Time Machine backup for my MBP is gone as I had to do a restore from backup and after that it told me I needed to create a new backup and it would delete the old ones. Well it deleted the old ones and the new backup failed. It was a HD problem. Luckily I saved the important stuff. I really just need to get any of the OS versions installed so I can boot the computer up and then from there download the upgrades from there. My iMac is too old and will not let me download El Captain.