I am trying to install the Public Beta version of El Capitan and after about 10-15 mins of trying to install, a message pops up that says "no packages were eligible for install" and the installation fails. Here's what I've tried so far: Restarting with command + r: - I do not have a Time Machine backup. - Disk Utility: I have my internal Mac HD listed, "Apple disk image" with "OS X Base System", and then about 10 or so "untitled" disk images. I ran First Aid and everything checks out. - Reintall OS X: my only option here is to proceed with the installation of El Capitan. When I try from this screen a message pops up saying it needs to verify my computer's eligibility. When I click Continue an error occurs: "An error occurred while preparing the installation. Try running this application again." Any ideas?