diff --git a/.github/workflows/conda-package-build.yml b/.github/workflows/conda-package-build.yml
deleted file mode 100644
index 29cb5d0..0000000
--- a/.github/workflows/conda-package-build.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-name: OpenAlea CI
-
-on:
-  push:
-    branches:
-     - main
-     - master
-    tags:
-      - 'v*'
-  pull_request:
-    types:
-      - opened
-      - synchronize
-      - reopened
-  release:
-    types:
-      - published
-
-jobs:
-  build:
-    uses: openalea/action-build-publish-anaconda/.github/workflows/openalea_ci.yml@main
-    secrets:
-      anaconda_token: ${{ secrets.ANACONDA_TOKEN }}
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 24712b4..8c3c3ce 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,6 +15,11 @@ if(NOT OpenMP_CXX_FOUND)
     message(WARNING "failed to find OpenMP")
 endif()
 
+# apple newer C++ features with old SDK
+if(APPLE)
+    set(CMAKE_CXX_FLAGS "${CXXFLAGS} -D_LIBCPP_DISABLE_AVAILABILITY")
+endif()
+
 # Embree4
 find_package(embree 4.0 REQUIRED)
 if (${embree_FOUND})
@@ -24,17 +29,6 @@ else()
   message(FATAL_ERROR "Could not find Embree")
 endif()
 
-# OpenMP
-if(APPLE)
-    set(CMAKE_CXX_COMPILER clang++)
-    set(CMAKE_CXX_FLAGS "${CXXFLAGS} -D_LIBCPP_DISABLE_AVAILABILITY")
-
-    if(CMAKE_CXX_COMPILER_ID MATCHES "Clang\$")
-        set(OpenMP_CXX_FLAGS "-Xpreprocessor -fopenmp")
-        set(OpenMP_CXX_LIB_NAMES "omp")
-        set(OpenMP_omp_LIBRARY omp)
-    endif()
-endif()
 
 # externals
 add_subdirectory("externals")