diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f54f603..d069a77 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -24,6 +24,9 @@ jobs:
           - os: windows-latest
             arch-name: windowsx86-64
             extra-flags: -DCMAKE_CXX_COMPILER=clang-cl -DCMAKE_C_COMPILER=clang-cl
+          - os: macos-latest
+            arch-name: osxuniversal
+            extra-flags: -DCMAKE_OSX_ARCHITECTURES="arm64;x86_64"
 
     runs-on: ${{ matrix.os }}
     name: "mrcal-jni - Build - ${{ matrix.arch-name }}"
@@ -45,10 +48,14 @@ jobs:
         distribution: temurin
 
     - name: Install deps
-      if: runner.os == 'Linux'
+      if: runner.os == 'Linux' || runner.os == 'macOS'
       run: |
-        sudo apt update
-        sudo apt-get install -y cmake ninja-build gcc g++ liblist-moreutils-perl
+        if [ $RUNNER_OS == "Linux" ]; then
+          sudo apt update
+          sudo apt-get install -y cmake ninja-build gcc g++ liblist-moreutils-perl
+        elif [ $RUNNER_OS == "macOS" ]; then
+          sudo cpan -i List::MoreUtils
+        fi
 
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d5bda09..a02ce96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,6 +41,7 @@ FetchContent_MakeAvailable(opencv_header)
 file(GLOB_RECURSE OPENCV_LIB_PATH
   "${opencv_lib_SOURCE_DIR}/**/*.lib"
   "${opencv_lib_SOURCE_DIR}/**/*.so*"
+  "${opencv_lib_SOURCE_DIR}/**/*.*.dylib"
 )
 SET(OPENCV_INCLUDE_PATH ${opencv_header_SOURCE_DIR})
 message("Depending on opencv ${OPENCV_LIB_PATH}")
@@ -63,39 +64,46 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
 # Silence OpenBLAS/LAPACK warnings
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -w")
-set(BLA_VENDOR OpenBLAS)
-fetchcontent_declare(
-    BLAS
-    GIT_REPOSITORY https://github.com/OpenMathLib/OpenBLAS.git
-    GIT_TAG v0.3.30
-    OVERRIDE_FIND_PACKAGE
-)
-fetchcontent_makeavailable(BLAS)
-
-if(TARGET openblas)
-    set(OPENBLAS_TARGET openblas)
-    message(STATUS "Using openblas target")
-elseif(TARGET OpenBLAS)
-    set(OPENBLAS_TARGET OpenBLAS)
-    message(STATUS "Using OpenBLAS target")
-elseif(TARGET libopenblas)
-    set(OPENBLAS_TARGET libopenblas)
-    message(STATUS "Using libopenblas target")
-else()
-    # Fallback: find the library file manually
-    find_library(OPENBLAS_LIB
-        NAMES openblas libopenblas
-        PATHS 
-            ${openblas_external_BINARY_DIR}
-            ${openblas_external_BINARY_DIR}/lib
-            ${openblas_external_BINARY_DIR}/lib/Release
-        NO_DEFAULT_PATH
-        REQUIRED
+if(NOT APPLE)
+    set(BLA_VENDOR OpenBLAS)
+    fetchcontent_declare(
+        BLAS
+        GIT_REPOSITORY https://github.com/OpenMathLib/OpenBLAS.git
+        GIT_TAG v0.3.30
+        OVERRIDE_FIND_PACKAGE
     )
-    message(STATUS "Using OpenBLAS library file: ${OPENBLAS_LIB}")
-    add_library(openblas_imported STATIC IMPORTED)
-    set_target_properties(openblas_imported PROPERTIES IMPORTED_LOCATION ${OPENBLAS_LIB})
-    set(OPENBLAS_TARGET openblas_imported)
+    fetchcontent_makeavailable(BLAS)
+
+    if(TARGET openblas)
+        set(OPENBLAS_TARGET openblas)
+        message(STATUS "Using openblas target")
+    elseif(TARGET OpenBLAS)
+        set(OPENBLAS_TARGET OpenBLAS)
+        message(STATUS "Using OpenBLAS target")
+    elseif(TARGET libopenblas)
+        set(OPENBLAS_TARGET libopenblas)
+        message(STATUS "Using libopenblas target")
+    else()
+        # Fallback: find the library file manually
+        find_library(OPENBLAS_LIB
+            NAMES openblas libopenblas
+            PATHS 
+                ${openblas_external_BINARY_DIR}
+                ${openblas_external_BINARY_DIR}/lib
+                ${openblas_external_BINARY_DIR}/lib/Release
+            NO_DEFAULT_PATH
+            REQUIRED
+        )
+        message(STATUS "Using OpenBLAS library file: ${OPENBLAS_LIB}")
+        add_library(openblas_imported STATIC IMPORTED)
+        set_target_properties(openblas_imported PROPERTIES IMPORTED_LOCATION ${OPENBLAS_LIB})
+        set(OPENBLAS_TARGET openblas_imported)
+    endif()
+else()
+    set ( BLA_VENDOR Apple )
+    add_compile_definitions(ACCELERATE_NEW_LAPACK=1)
+    add_compile_definitions(ACCELERATE_LAPACK_ILP64=1)
+    find_package ( BLAS )
 endif()
 
 # Configure SuiteSparse to use BLAS
@@ -117,7 +125,11 @@ fetchcontent_makeavailable(SuiteSparse)
 
 get_target_property(CHOLMOD_LIBS SuiteSparse::CHOLMOD_static INTERFACE_LINK_LIBRARIES)
 message(STATUS "CHOLMOD links to: ${CHOLMOD_LIBS}")
-message(STATUS "BLAS is at: ${OPENBLAS_TARGET}")
+if(NOT APPLE)
+    message(STATUS "BLAS is at: ${OPENBLAS_TARGET}")
+else()
+    message(STATUS "BLAS is using Apple Accelerate")
+endif()
 
 # And pull in JNI
 find_package(JNI)
diff --git a/mrcal b/mrcal
index 0d5426b..a980307 160000
--- a/mrcal
+++ b/mrcal
@@ -1 +1 @@
-Subproject commit 0d5426b5851be80dd8e51470a0784a73565a3006
+Subproject commit a980307d7ad95a0595a3da149ea710aed588c163
diff --git a/src/mrcal_test.cpp b/src/mrcal_test.cpp
index 0c70686..9a63d68 100644
--- a/src/mrcal_test.cpp
+++ b/src/mrcal_test.cpp
@@ -15,7 +15,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-#include <malloc.h>
+#include <stdlib.h>
 #include <stdint.h>
 
 #include <algorithm>
diff --git a/src/mrcal_wrapper.cpp b/src/mrcal_wrapper.cpp
index 2be5add..983d8cf 100644
--- a/src/mrcal_wrapper.cpp
+++ b/src/mrcal_wrapper.cpp
@@ -15,7 +15,7 @@
 
 #include "mrcal_wrapper.h"
 
-#include <malloc.h>
+#include <stdlib.h>
 #include <stdint.h>
 
 #include <algorithm>