Reinstall Mac OS X fails

One some older Mac’s some issue can install with the automatic installation when you boot with Option-R / Option-Shift-R.

A possible workaround is to make an internet install on an external disk and then let the installation start from that.

  1. Start your Mac holding down Command + R.
  2. Prepare a clean external drive (at least 10 GB of storage).
  3. Within OS X Utilities, choose Reinstall OS X.
  4. Select external drive as a source.

Your Mac will restart and make the installation…

Thanks to this site.