Osx installation instructions

Summary:
{F157239864}

{F157240350}

(Note: this ignores all push blocking failures!)

Reviewed By: ldworkin

Differential Revision: D15170226

fbshipit-source-id: 8a47bce21e66e3792e663c6b385cae91361ba21d

docs/installation.md

@@ -16,7 +16,7 @@ The required Python dependencies are:
 * sklearn
 * plotly >=2.2.1, <3.0
 
-### Installation via pip 
+### Installation via pip
 We recommend installing Ax via pip.
 To do so, run:
 
@@ -25,8 +25,8 @@ pip3 install ax-platform
 ```
 
 *Recommendation for MacOS users*: PyTorch is a required dependency of BoTorch, and can be automatically installed via pip.
-However, we recommend you install PyTorch manually before installing Ax, using the Anaconda package manager. 
-Installing from Anaconda will link against MKL (a library that optimizes mathematical computation for Intel processors). 
+However, **we recommend you [install PyTorch manually](https://pytorch.org/get-started/locally/#anaconda-1) before installing Ax, using the Anaconda package manager**.
+Installing from Anaconda will link against MKL (a library that optimizes mathematical computation for Intel processors).
 This will result in up to an order-of-magnitude speed-up for Bayesian optimization, as at the moment, installing PyTorch from pip does not link against MKL.
 
 ### Installing from source

website/pages/en/index.js

@@ -144,8 +144,9 @@ class Index extends React.Component {
         <Container>
           <ol>
             <li>
-              Install Ax via pip:
-              <MarkdownBlock>{bash`pip3 install ax-platform`}</MarkdownBlock>
+              Install Ax:
+              <MarkdownBlock>{bash`conda install pytorch torchvision -c pytorch  # OSX only`}</MarkdownBlock>
+              <MarkdownBlock>{bash`pip3 install ax-platform  # all systems`}</MarkdownBlock>
             </li>
             <li>
               Run an optimization: