diff --git a/README.md b/README.md
index 872519b8a0e1a4e52268b7460a27934aafdcf33a..0b6d58bb3abd74f0679d6982d3d8fc32211bca77 100644
--- a/README.md
+++ b/README.md
@@ -91,7 +91,7 @@ for r in results:
 - msgpack-c 1.2+, used for data serialization.
 - GnuTLS 3.3+, used for cryptographic operations.
 - Nettle 2.4+, a GnuTLS dependency for crypto.
-- Build tested with GCC 4.8+ (GNU/Linux, Android, Windows with MinGW), Clang/LLVM (Linux, OS X).
+- Build tested with GCC 4.8+ (GNU/Linux, Android, Windows with MinGW), Clang/LLVM (Linux, macOS).
 - Build tested with Microsoft Visual Studio 2015
 
 ## Contact