Hello, I am quite the techie .... in the Windows world so my friend asked me if I could upgrade his Mac Mini (late 2009 version) with an SSD drive and some RAM. I said sure, I mean how hard can it be? Well, I am stuck. I tried all I could find on forums, YouTube etc... Nothing works, for me at least.. I guess I lack some basic understanding of the MAC world and that's why I need your help, Please! Let's resume. I have a MAC mini (late 2009 version), running Yosemite. I have a new, bigger SSD drive. I have a 32Gb USB flashdrive. I also have the sources of El Capitan (version 15D21) but in a folder and files format, not dmg. Couldn't find it. I simply want a new, from scratch, installation of El Capitan, on the SSD drive. I don't care about the old data. How do you do that? I tried preparing a bootable El Capitan flashdrive. I failed. I tried cloning the old HDD to the SSD using Carbon Copy Cloner. It failed. Isn't there a way to prepare a "working" bootable El Capitan flashdrive using the sources I have, mount the formatted SSD drive into the MAC mini and then simply install from scratch like I do in Windows? Please help!