Install instructions from OSX R to use source

README.md

@@ -27,6 +27,12 @@ Prophet is a [CRAN package](https://cran.r-project.org/package=prophet) so you c
 > install.packages('prophet')
 ```
 
+On Mac OS X, the binaries on CRAN are still being updated, so use
+```
+# R
+> install.packages('prophet', type='source')
+```
+
 After installation, you can [get started!](https://facebook.github.io/prophet/docs/quick_start.html#r-api)
 
 ### Windows

docs/_docs/installation.md

@@ -16,6 +16,12 @@ Prophet is a [CRAN package](https://cran.r-project.org/package=prophet) so you c
 > install.packages('prophet')
 ```
 
+On Mac OS X, the binaries on CRAN are still being updated, so use
+```
+# R
+> install.packages('prophet', type='source')
+```
+
 After installation, you can [get started!](quick_start.html#r-api)
 
 ### Windows