diff --git a/INSTALL.md b/INSTALL.md
index e8af31e..913b2d7 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -14,3 +14,4 @@ Use `make all` to build, `make install` to install relative to `PREFIX`
 - OpenBSD 5.9
 - OpenBSD 6.1
 - Windows 10 (Version 1151) with Cygwin 2.3.1(0.291/5/3)
+- OS X Yosemite (10.10.5)