diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index f050c88..b381e71 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -45,13 +45,13 @@ jobs:
 
       - run: |
           sudo python -m pip install --upgrade pip
-          sudo pip install -r requirements.txt
+          sudo pip install -U -r requirements.txt
 
       - name: Setup Cpp
         if: startsWith(matrix.os, 'ubuntu')
         uses: aminya/setup-cpp@v1
         with:
-          llvm: true
+          gcc: true
           ccache: true
           clangtidy: true
           clangformat: true
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 55a6ed7..61ea740 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -157,7 +157,10 @@ if(NETKIT_TFTP_TESTS)
 
     add_executable(option_test option_test.cpp async_tftpd_server.hpp)
     target_link_libraries(option_test PRIVATE tftpd)
-    # FIXME add_test(NAME option_test COMMAND option_test)
+
+    if(APPLE)
+        add_test(NAME option_test COMMAND option_test)
+    endif()
 
     add_executable(tftpd_test tftpd_test.cpp async_tftpd_server.hpp)
     target_link_libraries(tftpd_test PRIVATE tftpd)
diff --git a/GNUmakefile b/GNUmakefile
index 974a664..6e7c10b 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -22,8 +22,8 @@ PROJECT_NAME:=$(shell basename $${PWD})
 # prevent hard config of find_package(asio 1.14.1 CONFIG CMAKE_FIND_ROOT_PATH_BOTH)
 ifeq (NO${CROSS_COMPILE},NO)
     ifeq (${UNAME},Darwin)
-        #TODO CC:=/usr/local/opt/llvm/bin/clang
-        #TODO CXX:=/usr/local/opt/llvm/bin/clang++
+        CC:=/usr/bin/gcc
+        CXX:=/usr/bin/g++
         BOOST_ROOT:=/usr/local/opt/boost
         export BOOST_ROOT
     endif
@@ -44,7 +44,7 @@ endif
 #NO!    BUILD_TYPE=Coverage make lcov
 BUILD_TYPE?=Debug
 BUILD_TYPE?=Release
-# GENERATOR:=Xcode
+GENERATOR:=Xcode
 GENERATOR?=Ninja
 
 # end of config part