Sierra is a thing (#3294)
diff --git a/docs/installation.rst b/docs/installation.rst
index e1818d3..9ad9a3c 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -15,8 +15,8 @@
* x86-64 CentOS 7.x, 6.4
* x86-64 FreeBSD 10
-* OS X 10.11 El Capitan, 10.10 Yosemite, 10.9 Mavericks, 10.8 Mountain Lion,
- and 10.7 Lion
+* OS X 10.12 Sierra, 10.11 El Capitan, 10.10 Yosemite, 10.9 Mavericks,
+ 10.8 Mountain Lion, and 10.7 Lion
* x86-64 Ubuntu 12.04 LTS and Ubuntu 14.04 LTS
* x86-64 Debian Wheezy (7.x), Jessie (8.x), and Debian Sid (unstable)
* 32-bit and 64-bit Python on 64-bit Windows Server 2012