Update the list of macOS versions we test on to match reality (#3942)
diff --git a/docs/installation.rst b/docs/installation.rst
index e2ef1b6..51caefd 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -15,7 +15,7 @@
* x86-64 CentOS 7.x
* x86-64 FreeBSD 11
-* macOS 10.12 Sierra, 10.11 El Capitan, 10.10 Yosemite, 10.9 Mavericks
+* macOS 10.12 Sierra, 10.11 El Capitan
* x86-64 Ubuntu 14.04, 16.04, and rolling
* x86-64 Debian Wheezy (7.x), Jessie (8.x), Stretch (9.x), and Sid (unstable)
* x86-64 Alpine (latest)