Download El Capitan and install fresh the Mac OS without upgrading the current Mac OS version The second method of installation is the clean install method. It basically erases the entire content of your chosen drive and installs a fresh, smooth version of the new operating system which is downloaded El Capitan Mac OS X in this case. Was trying to instal el capitan on my macbook, the installation starts and after a few minutes stops and a messaging saying the os x could'nt be install on the computer, please contact the software editor to get help. I called apple and they said they can't give me any tech support, i guess cause my computer is too 'old'. Dec 16, 2017 @Tetsujin I don't mind losing all my date, I've backed most of my important things up. I'm just curious to know if there is a quicker way to download the installer directly, rather than having to completely wipe my HDD and downloading having to download my OS from internet recovery mode, and then download El Capitan from that one. I just put in a new SSD and want to do a fresh OSX install. I believe that El Capitan is the last supported software for this hardware. I'm looking for an OS X El capitan.app download but I can't seem to find it anywhere. I managed to find an OSX El Capitan.dmg file, but that doesn't seem to work with the createinstallmedia tool. Aug 27, 2021 If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first. If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD. Allow installation to complete without putting your Mac to sleep or closing its lid.