diff --git a/CMakeLists.txt b/CMakeLists.txt
index 72412150e..74341ed38 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,5 @@
 cmake_minimum_required(VERSION 3.8)
+set(CMAKE_OSX_DEPLOYMENT_TARGET "11.0" CACHE STRING "")
 include(ProcessorCount)
 
 project(Alive2)