diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 80882bedb..887286bdb 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -231,12 +231,6 @@ if (NOT LIBUSB_FOUND AND NOT USE_PRECOMPILED_LIBS)
     elseif (APPLE)
         set(LIBUSB_LIBRARIES "${install_dir}/lib/libusb-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}" CACHE INTERNAL "")
         set(MACOS_EXTERNAL_LIBS_FIXUP "${MACOS_EXTERNAL_LIBS_FIXUP};${install_dir}/lib")
-        add_custom_command(TARGET libusb POST_BUILD
-                    COMMAND codesign -vv "${install_dir}/lib/libusb-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}"
-                    COMMENT "checking signature on libusb")
-        add_custom_command(TARGET libusb POST_BUILD
-                    COMMAND md5sum "${install_dir}/lib/libusb-1.0${CMAKE_SHARED_LIBRARY_SUFFIX}"
-                    COMMENT "md5sum for libusb")
     endif ()
 endif (NOT LIBUSB_FOUND AND NOT USE_PRECOMPILED_LIBS)