I downloaded a thing (site seemed reputable and no bugs or anything. My history (since I've forgotten the site) indicates it's from Apple itself) (I usually know what I'm doing I swear). The installation mostly went fine but I got the "The Installer Disc Could Not Be Found" popup. I'm using a 16gb USB and have a Macbook Pro laptop bought in early 2011. The version of what I got is apparently compatible with my laptop. I've added a screenshot of the folders just in case there's something I missed that someone here can shed some light on. Is anything here really un-tech-savvy? I also haven't gotten to the stage where the .iso file is relevant and I might be missing something there if anyone can clear up anything about the process. Am I going to have to buy the damn thing? Or is my computer just too obsolete? Thanks!