How to do clean reinstall of Mac Mini (2011)?

[Bill Fitz]

I will be selling my mid-year 2011 Mac Mini.

Before selling the unit, I want to do a clean reinstall of OS X to remove all traces of my earlier work and personal data.

Since Apple no longer supplies backup installation discs, can someone provide the detailed instructions on how I can clean off my hard drive and do a fresh reinstall of OS X.

I am running Yosemite on this Mini.

Thank you in advance for any assistance.

 

[Pieterr]

See https://support.apple.com/en-us/HT201065