The recently-released, Mac OS X 10.11, El Capitan, will run on systems up to eight years old [1]. Maybe it won&#x27;t run well, particularly if the RAM is skimpy, but for any machine made in the current decade, it shouldn&#x27;t be much of a problem.<p>If your Macs are &quot;stuck on ancient OS releases,&quot; it&#x27;s likely because you have ancient Macs, or you just aren&#x27;t upgrading for some reason.<p>I don&#x27;t really understand your Ubuntu comment, but if you really find OS X to be too much of a dog, you can install Linux variants on Apple hardware as well.<p>1: <a href="http:&#x2F;&#x2F;osxdaily.com&#x2F;2015&#x2F;06&#x2F;09&#x2F;os-x-el-capitan-system-requirements-compatible-mac&#x2F;" rel="nofollow">http:&#x2F;&#x2F;osxdaily.com&#x2F;2015&#x2F;06&#x2F;09&#x2F;os-x-el-capitan-system-requir...</a>