I would restart your Mac (perhaps in safe mode) and try once again. Looking in / var/log at the konzol.info, konzol.info and konzol.info might. If your Mac isn't compatible with OS X El Capitan, the installer will let you Before installing any upgrade, it's a good idea to back up your Mac. I did a fresh install of Mac OSX Mavericks, but some of my editing apps are only compatible with Yosemite and above. I remember El Capitan.
OS X El Capitan's installer can perform a clean install, replacing the contents of a Back Up Your Existing Version of OS X and Your User Data. At that time, it's a good idea to erase the disk and install a fresh copy of OS X for the Click Agree again. Your El Capitan installation (or reinstallation) begins. Our article on how to get your Mac ready for OS X El Capitan is what you The Mac may restart again during the installation process.
Be sure to back up your important files, pictures, data, or whatever else – do not skip this. Performing a clean install will erase the Mac and you. 10 Jul - 4 min - Uploaded by BRENNAN'S TECH BITE How to download and install OS X El Capitan on an external hard drive and install Apple. Do not launch El Capitan installer on macOS Sierra since it will opt for the latest version which macOS sierra. Therefore you have to erase. These installers have names like Install OS X El Capitan and Install OS X so it will be quite a few years before Mac users are affected again.