<a href="http:&#x2F;&#x2F;elementary.io&#x2F;" rel="nofollow">http:&#x2F;&#x2F;elementary.io&#x2F;</a> &amp; <a href="http:&#x2F;&#x2F;www.linuxmint.com&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.linuxmint.com&#x2F;</a> are the two distros I often hear about.  
I have not tested them myself though, I might someday if OsX becomes too closed-up to be useful for my needs.<p>Even with all the random problems I had with the first version of El Capitan, I doubt that a linux distro can rival the polish of OsX though. Of course, I would love to be wrong.