title: How can I install a Homebrew bottle designed for a different (previous) version of macOS
body: <p>I haven't been able to find a way to install prior versions of software since the removal of the <code>versions</code> command and tap in Homebrew. I'm running macOS 10.14.3 (Mojave) on a 2008 Mac Pro (3,1). I've run into one or two Homebrew packages that assume I have a Nehalem processor, but my Penryn Xeon doesn’t' support some of the instructions. </p>
  
  <p>After some troubleshooting, I was told to install a previous version of a bottle, but I can't find any instructions or documentation on how to specify a bottle version. Is there a way from within Homebrew to specify a bottle version? Preferably one that will allow me to use <code>brew update</code> in the future? The current method of <code>brew install foo --build-bottle --build-arch=core2</code> isn't really ideal when someone else has already built an appropriate bottle. </p>