diff --git a/.github/workflows/sdrangel.yml b/.github/workflows/sdrangel.yml
index d77248f37a..a26c2e7929 100644
--- a/.github/workflows/sdrangel.yml
+++ b/.github/workflows/sdrangel.yml
@@ -6,6 +6,7 @@ on:
   push:
     branches:
       - master
+      - mac_ci
     tags:
       - 'v*'
   pull_request:
@@ -40,9 +41,6 @@ jobs:
           echo github.event_name: ${{ github.event_name }}
           echo github.ref: ${{ github.ref }}
           echo github.workspace: ${{ github.workspace }}
-      - name: Get version
-        id: get_version
-        run: echo "version=$(git describe --tags | cut -c2-)" >> $env:GITHUB_OUTPUT
       - name: Install basic dependencies on Windows
         if: startsWith(matrix.config.os, 'windows')
         run: |
@@ -85,6 +83,11 @@ jobs:
           mkdir build && cd build
           cmake .. -G "${{ matrix.config.generators }}" -DCMAKE_BUILD_TYPE=Release -DARCH_OPT=SSE4_2 -DDEBUG_OUTPUT=ON -DENABLE_MIRISDR=OFF -DBUILD_SERVER=OFF -DCMAKE_PREFIX_PATH="C:\Qt\5.15.2\msvc2019_64;C:\Libraries\boost_1_73_0"
           cmake --build . --config Release --target package
+      - name: Check disk space
+        run: Get-PSDrive
+      - name: Get version
+        id: get_version
+        run: echo "version=$(grep sdrangel_VERSION build/CMakeCache.txt | cut -d "=" -f2)" >> $env:GITHUB_OUTPUT
       - name: Upload artifact
         uses: actions/upload-artifact@v3
         with:
@@ -95,3 +98,31 @@ jobs:
         uses: softprops/action-gh-release@v0.1.13
         with:
           files: ${{ github.workspace }}/build/sdrangel-${{ steps.get_version.outputs.version }}-win64.exe
+
+  build_mac:
+    runs-on: macos-11
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: true
+          fetch-depth: 0
+      - name: Update brew
+        run: brew update
+      - name: Install brew packages
+        run: brew install nasm boost hidapi libusb fftw ffmpeg faad2 opencv zlib airspy airspyhf hackrf rtl-sdr libbladerf uhd soapysdr
+      - name: Configure SDRangel
+        run: |
+          mkdir build && cd build
+          cmake .. -DCMAKE_VERBOSE_MAKEFILE=ON -DENABLE_QT6=ON -DCMAKE_BUILD_TYPE=Release -DARCH_OPT=nehalem -DDEBUG_OUTPUT=ON -DENABLE_MIRISDR=OFF -DBUILD_SERVER=OFF -DENABLE_EXTERNAL_LIBRARIES=AUTO -DBUNDLE=ON -DPKG_CONFIG_USE_CMAKE_PREFIX_PATH=TRUE
+      - name: Get filename
+        id: get_filename
+        run: echo "filename=$(grep CPACK_PACKAGE_FILE_NAME build/CMakeCache.txt | cut -d "=" -f2)" >> $GITHUB_OUTPUT
+      - name: Build SDRangel on Mac
+        run: |
+          cd build
+          make package -j3
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: ${{ steps.get_filename.outputs.filename }}.dmg
+          path: ${{ github.workspace }}/build/${{ steps.get_filename.outputs.filename }}.dmg
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d7fda37af8..e6cf4cea8a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -173,7 +173,7 @@ if(GIT_FOUND AND EXISTS "${CMAKE_SOURCE_DIR}/.git/")
     endif()
 endif()
 
-set(sdrangel_VERSION "${sdrangel_VERSION_MAJOR}.${sdrangel_VERSION_MINOR}.${sdrangel_VERSION_PATCH}${sdrangel_VERSION_SUFFIX}")
+set(sdrangel_VERSION "${sdrangel_VERSION_MAJOR}.${sdrangel_VERSION_MINOR}.${sdrangel_VERSION_PATCH}${sdrangel_VERSION_SUFFIX}" CACHE INTERNAL "")
 message(STATUS "${APPLICATION_NAME} Version: ${sdrangel_VERSION}")
 add_definitions("-DSDRANGEL_LIB_VERSION=\"${sdrangel_VERSION_MAJOR}.${sdrangel_VERSION_MINOR}.${sdrangel_VERSION_PATCH}\"")
 add_definitions("-DSDRANGEL_VERSION=\"${sdrangel_VERSION}\"")
@@ -753,6 +753,7 @@ if (NOT ENABLE_EXTERNAL_LIBRARIES OR (ENABLE_EXTERNAL_LIBRARIES STREQUAL "AUTO")
     find_package(AptDec)
     find_package(LibDAB)
     find_package(HIDAPI)
+    find_package(FFmpeg COMPONENTS AVCODEC AVFORMAT AVUTIL SWSCALE)
 
     # Devices
     if(ENABLE_AIRSPY)
diff --git a/app/main.cpp b/app/main.cpp
index 62d45943ce..9c8b0a7ad9 100644
--- a/app/main.cpp
+++ b/app/main.cpp
@@ -24,7 +24,9 @@
 #include <QSysInfo>
 #include <QSettings>
 #ifdef __APPLE__
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
 #include <QGLFormat>
+#endif
 #include <QSurfaceFormat>
 #endif
 #ifdef ANDROID
@@ -212,10 +214,12 @@ int main(int argc, char* argv[])
     // will not work. Because of this, we have two versions of the shaders:
     // OpenGL 2 versions for compatiblity with older drivers and OpenGL 3.3
     // versions for newer drivers
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
     QGLFormat fmt;
     fmt.setVersion(3, 3);
     fmt.setProfile(QGLFormat::CoreProfile);
     QGLFormat::setDefaultFormat(fmt);
+#endif
     QSurfaceFormat sfc;
     sfc.setVersion(3, 3);
     sfc.setProfile(QSurfaceFormat::CoreProfile);
diff --git a/cmake/cpack/CMakeLists.txt b/cmake/cpack/CMakeLists.txt
index 318e205526..e454d467a3 100644
--- a/cmake/cpack/CMakeLists.txt
+++ b/cmake/cpack/CMakeLists.txt
@@ -36,7 +36,7 @@ if(APPLE AND BUNDLE AND BUILD_GUI)
   set(CPACK_BUNDLE_ICON "${CMAKE_SOURCE_DIR}/cmake/cpack/sdrangel_icon.icns")
   set(CPACK_BUNDLE_PLIST "${CMAKE_BINARY_DIR}/Info.plist")
   set(CPACK_PACKAGE_ICON "${CMAKE_SOURCE_DIR}/cmake/cpack/sdrangel_icon.icns")
-  set(CPACK_PACKAGE_FILE_NAME "${CMAKE_PROJECT_NAME}-${CPACK_PACKAGE_VERSION}_${CPACK_MACOS_PACKAGE_ARCHITECTURE}_${CMAKE_SYSTEM_PROCESSOR}")
+  set(CPACK_PACKAGE_FILE_NAME "${CMAKE_PROJECT_NAME}-${CPACK_PACKAGE_VERSION}_${CPACK_MACOS_PACKAGE_ARCHITECTURE}_${CMAKE_SYSTEM_PROCESSOR}" CACHE INTERNAL "")
   set(CPACK_PRE_BUILD_SCRIPTS "${PROJECT_BINARY_DIR}/deploy_mac.cmake")
 
   # copy SoapySDR Modules
@@ -331,7 +331,7 @@ elseif(WIN32 OR MINGW)
       endforeach()
     " COMPONENT Runtime)
 
-    list(APPEND CPACK_GENERATOR "ZIP;NSIS")
+    list(APPEND CPACK_GENERATOR "NSIS")
     set(CPACK_MONOLITHIC_INSTALL ON)
     set(CPACK_NSIS_HELP_LINK ${CPACK_PACKAGE_CONTACT})
     set(CPACK_NSIS_URL_INFO_ABOUT ${CPACK_PACKAGE_CONTACT})
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index e26f489229..e9b3b28cb9 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -1478,7 +1478,7 @@ if (WIN32 OR APPLE)
         endif ()
     endif (ENABLE_BLADERF)
 
-    if (ENABLE_USRP AND Boost_FOUND AND NOT WIN32)
+    if (ENABLE_USRP AND Boost_FOUND AND NOT WIN32 AND ((NOT UHD_FOUND) OR (ENABLE_EXTERNAL_LIBRARIES STREQUAL "ON")))
         ExternalProject_Add(uhd
                 GIT_REPOSITORY https://github.com/EttusResearch/uhd.git
                 GIT_TAG v4.2.0.0
@@ -1504,7 +1504,7 @@ if (WIN32 OR APPLE)
             set(UHD_LIBRARIES "${install_dir}/lib/libuhd${CMAKE_SHARED_LIBRARY_SUFFIX}" CACHE INTERNAL "")
             set(MACOS_EXTERNAL_LIBS_FIXUP "${MACOS_EXTERNAL_LIBS_FIXUP};${install_dir}/lib")
         endif ()
-    endif (ENABLE_USRP AND Boost_FOUND AND NOT WIN32)
+    endif (ENABLE_USRP AND Boost_FOUND AND NOT WIN32 AND ((NOT UHD_FOUND) OR (ENABLE_EXTERNAL_LIBRARIES STREQUAL "ON")))
 
 endif (WIN32 OR APPLE)
 
diff --git a/sdrbase/util/psk31.cpp b/sdrbase/util/psk31.cpp
index 731410711b..24efe6c47b 100644
--- a/sdrbase/util/psk31.cpp
+++ b/sdrbase/util/psk31.cpp
@@ -302,7 +302,7 @@ void PSK31Encoder::addCode(unsigned& bits, unsigned int& bitCount, const QString
     unsigned int codeLen = code.size();
 
     for (unsigned int i = 0; i < codeLen; i++) {
-        codeBits |= (code[i] == "1" ? 1 : 0) << i;
+        codeBits |= (code[i] == '1' ? 1 : 0) << i;
     }
 
     addStartBits(bits, bitCount);