diff --git a/CMakeLists.txt b/CMakeLists.txt
index d6afc71ba..c2b0a09b1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,7 @@
 cmake_minimum_required(VERSION 3.14)
+
 set(CMAKE_LEGACY_CYGWIN_WIN32 0)
+set(CMAKE_OSX_DEPLOYMENT_TARGET "10.15" CACHE STRING "Minimum OS X deployment target")
 
 project(g2o)