diff --git a/.github/workflows/mac.yml b/.github/workflows/mac.yml
new file mode 100644
index 000000000..df580c66d
--- /dev/null
+++ b/.github/workflows/mac.yml
@@ -0,0 +1,127 @@
+name: SDRangel Mac release build
+
+on:
+  push:
+    branches:
+      - mac_ci
+    tags:
+      - 'v*'
+
+jobs:
+  build_mac_x64:
+    runs-on: macos-13
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+          fetch-depth: 0
+      - name: Update brew
+        run: brew update
+      - name: Install brew packages
+        run: brew install nasm subversion
+      - name: Install SDRplay API
+        run: |
+            wget https://www.sdrplay.com/software/SDRplayAPI-macos-installer-universal-3.15.0.pkg
+            sudo installer -pkg SDRplayAPI-macos-installer-universal-3.15.0.pkg -target /
+      - name: Install python
+        run: |
+            wget  https://www.python.org/ftp/python/3.12.7/python-3.12.7-macos11.pkg
+            sudo installer -pkg python-3.12.7-macos11.pkg -target /
+      - name: Install python packages for UHD
+        run: |
+            /usr/local/bin/python3.12 -m pip install numpy mako requests Cheetah3 setuptools
+      - name: Install Qt
+        uses: jurplel/install-qt-action@v4
+        with:
+          version: '6.7.3'
+          host: 'mac'
+          arch: 'clang_64'
+          modules: 'qtcharts qtscxml qt5compat qtlocation qtmultimedia qtpositioning qtserialport qtspeech qtwebsockets qtwebengine qtshadertools qtwebchannel'
+      - 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_USRP=ON -DENABLE_MIRISDR=OFF -DBUILD_SERVER=OFF -DENABLE_EXTERNAL_LIBRARIES=ON -DBUNDLE=ON -DPKG_CONFIG_USE_CMAKE_PREFIX_PATH=TRUE -DPYTHON_EXECUTABLE=/usr/local/bin/python3.12
+      - name: Build SDRangel on Mac
+        run: |
+          cd build
+          make -j4 package
+      - name: Get version
+        id: get_version
+        run: |
+            if [[ "${{github.ref_name}}" == "mac_ci" ]]; then
+                echo "version=$(echo ${{github.sha}} | cut -c1-7)" >> $GITHUB_OUTPUT
+            else
+                echo "version=$(echo ${{github.ref_name}} | cut -c2-)" >> $GITHUB_OUTPUT
+            fi
+      - name: Get filename
+        id: get_filename
+        run: echo "filename=$(grep CPACK_PACKAGE_FILE_NAME build/CMakeCache.txt | cut -d "=" -f2)" >> $GITHUB_OUTPUT
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: sdrangel-${{ steps.get_version.outputs.version }}-macx64.dmg
+          path: ${{ github.workspace }}/build/${{ steps.get_filename.outputs.filename }}.dmg
+      - name: Upload release
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: softprops/action-gh-release@v2
+        with:
+          files: ${{ github.workspace }}/build/${{ steps.get_filename.outputs.filename }}.dmg
+
+  build_mac_arm64:
+    runs-on: macos-14
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+          fetch-depth: 0
+      - name: Update brew
+        run: brew update
+      - name: Install brew packages
+        run: brew install nasm subversion
+      - name: Install SDRplay API
+        run: |
+            wget https://www.sdrplay.com/software/SDRplayAPI-macos-installer-universal-3.15.0.pkg
+            sudo installer -pkg SDRplayAPI-macos-installer-universal-3.15.0.pkg -target /
+      - name: Install python
+        run: |
+            wget  https://www.python.org/ftp/python/3.12.7/python-3.12.7-macos11.pkg
+            sudo installer -pkg python-3.12.7-macos11.pkg -target /
+      - name: Install python packages for UHD
+        run: |
+            /usr/local/bin/python3.12 -m pip install numpy mako requests Cheetah3 setuptools
+      - name: Install Qt
+        uses: jurplel/install-qt-action@v4
+        with:
+          version: '6.7.3'
+          host: 'mac'
+          arch: 'clang_64'
+          modules: 'qtcharts qtscxml qt5compat qtlocation qtmultimedia qtpositioning qtserialport qtspeech qtwebsockets qtwebengine qtshadertools qtwebchannel'
+      - name: Configure SDRangel
+        run: |
+          mkdir build && cd build
+          cmake .. -DCMAKE_VERBOSE_MAKEFILE=ON -DENABLE_QT6=ON -DCMAKE_BUILD_TYPE=Release -DDEBUG_OUTPUT=ON -DENABLE_USRP=ON -DENABLE_MIRISDR=OFF -DBUILD_SERVER=OFF -DENABLE_EXTERNAL_LIBRARIES=ON -DBUNDLE=ON -DPKG_CONFIG_USE_CMAKE_PREFIX_PATH=TRUE -DPYTHON_EXECUTABLE=/usr/local/bin/python3.12
+      - name: Build SDRangel on Mac
+        run: |
+          cd build
+          make -j3 package
+      - name: Get version
+        id: get_version
+        run: |
+            if [[ "${{github.ref_name}}" == "mac_ci" ]]; then
+                echo "version=$(echo ${{github.sha}} | cut -c1-7)" >> $GITHUB_OUTPUT
+            else
+                echo "version=$(echo ${{github.ref_name}} | cut -c2-)" >> $GITHUB_OUTPUT
+            fi
+      - name: Get filename
+        id: get_filename
+        run: echo "filename=$(grep CPACK_PACKAGE_FILE_NAME build/CMakeCache.txt | cut -d "=" -f2)" >> $GITHUB_OUTPUT
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: sdrangel-${{ steps.get_version.outputs.version }}-macarm64.dmg
+          path: ${{ github.workspace }}/build/${{ steps.get_filename.outputs.filename }}.dmg
+      - name: Upload release
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: softprops/action-gh-release@v2
+        with:
+          files: ${{ github.workspace }}/build/${{ steps.get_filename.outputs.filename }}.dmg
diff --git a/.github/workflows/sdrangel.yml b/.github/workflows/sdrangel.yml
index ac770c5d5..817ff7013 100644
--- a/.github/workflows/sdrangel.yml
+++ b/.github/workflows/sdrangel.yml
@@ -101,7 +101,7 @@ jobs:
           files: ${{ github.workspace }}/build/sdrangel-${{ steps.get_version.outputs.version }}-win64.exe
 
   build_mac:
-    runs-on: macos-13
+    runs-on: macos-14
     steps:
       - uses: actions/checkout@v4
         with:
@@ -126,10 +126,7 @@ jobs:
       - 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_CHANNELRX_DEMODDATV=OFF -DENABLE_CHANNELTX_MODDATV=OFF -DENABLE_MIRISDR=OFF -DBUILD_SERVER=OFF -DENABLE_EXTERNAL_LIBRARIES=AUTO -DBUNDLE=ON -DPKG_CONFIG_USE_CMAKE_PREFIX_PATH=TRUE -DCMAKE_PREFIX_PATH="/usr/local/opt/ffmpeg@5/"
-      - name: Get filename
-        id: get_filename
-        run: echo "filename=$(grep CPACK_PACKAGE_FILE_NAME build/CMakeCache.txt | cut -d "=" -f2)" >> $GITHUB_OUTPUT
+          cmake .. -DCMAKE_VERBOSE_MAKEFILE=ON -DENABLE_QT6=ON -DCMAKE_BUILD_TYPE=Release -DDEBUG_OUTPUT=ON -DENABLE_CHANNELRX_DEMODDATV=OFF -DENABLE_CHANNELTX_MODDATV=OFF -DENABLE_MIRISDR=OFF -DBUILD_SERVER=OFF -DENABLE_EXTERNAL_LIBRARIES=AUTO -DBUNDLE=ON -DPKG_CONFIG_USE_CMAKE_PREFIX_PATH=TRUE -DCMAKE_PREFIX_PATH="/usr/local/opt/ffmpeg@5/"
       - name: Build SDRangel on Mac
         run: |
           cd build
diff --git a/cmake/cpack/deploy_mac.cmake.in b/cmake/cpack/deploy_mac.cmake.in
index 20b45a21d..d6015e85a 100644
--- a/cmake/cpack/deploy_mac.cmake.in
+++ b/cmake/cpack/deploy_mac.cmake.in
@@ -1,14 +1,15 @@
 # This CPACK_PRE_BUILD_SCRIPTS script is used to copy all required Qt and other 3rd party libraries (SDR drivers and codecs) in to the .app bundle
 # It is run in a staging area (${CPACK_TEMPORARY_INSTALL_DIRECTORY}/SDRangel.app) after all targets have been installed (E.g. sdrangel exe and plugins)
 # The copying of frameworks and libraries is mostly done by 'macdeployqt', however, in order for 'macdeployqt' to copy libraries built by external/CMakeLists.txt,
-# we first need to add RPATHs into the libraries giving the locations of any libraries they might depend on. 
+# we first need to add RPATHs into the libraries giving the locations of any libraries they might depend on.
 # These paths are in the variable MACOS_EXTERNAL_LIBS_FIXUP set in externals/CMakeLists.txt
 # Is there an easier way to this?
 
 # Copy executable that will be run when icon in /Applications is clicked
 message ("Copying default executable to SDRangel.app/Contents/MacOS/SDRangel")
 execute_process (COMMAND mkdir ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/SDRangel.app/Contents/MacOS/)
-execute_process (COMMAND cp /opt/build/sdrangel/build/sdrangel ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/SDRangel.app/Contents/MacOS/SDRangel)
+execute_process (COMMAND pwd)
+execute_process (COMMAND cp sdrangel ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/SDRangel.app/Contents/MacOS/SDRangel)
 
 
 # Add RPATHS to libraries so macdeployqt can find out and copy all dependencies
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 137e77f26..619bbe7bc 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -31,15 +31,9 @@ set(SOAPYSDR_REMOTE_TAG "soapy-remote-0.5.1")
 set(AIRSPY_TAG "37c768ce9997b32e7328eb48972a7fda0a1f8554")
 set(HACKRF_TAG "v2022.09.1")
 set(LIBXML2_TAG "v2.10.4")
-set(UHD_TAG "v4.6.0.0")
-if (APPLE AND (CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL x86_64))
-    # UHD fails to load with 1.80+
-    set(BOOST_TAG "1.78.0")
-    set(BOOST_TAG2 "1_78_0")
-else()
-    set(BOOST_TAG "1.83.0")
-    set(BOOST_TAG2 "1_83_0")
-endif()
+set(UHD_TAG "v4.7.0.0")
+set(BOOST_TAG "1.86.0")
+set(BOOST_TAG2 "1_86_0")
 
 # For some external project macros
 include(ExternalProject)
@@ -546,7 +540,7 @@ endif (NOT FFMPEG_FOUND AND NOT USE_PRECOMPILED_LIBS)
 if (NOT OpenCV_FOUND AND NOT USE_PRECOMPILED_LIBS AND ENABLE_CHANNELTX_MODATV)
     ExternalProject_Add(opencv
             GIT_REPOSITORY https://github.com/opencv/opencv.git
-            GIT_TAG 4.5.5
+            GIT_TAG 4.10.0
             DEPENDS "${FFMPEG_DEPENDS}"
             PREFIX "${EXTERNAL_BUILD_LIBRARIES}/opencv"
             CMAKE_ARGS ${COMMON_CMAKE_ARGS} -DWITH_FFMPEG=ON -DCMAKE_PREFIX_PATH=${FFMPEG_INSTALL_DIR}
@@ -1578,6 +1572,8 @@ if (WIN32 OR APPLE)
                     -DLIBUSB_LIBRARIES=${LIBUSB_LIBRARIES}
                     -DLIBUSB_INCLUDE_DIR=${LIBUSB_INCLUDE_DIR}
                     ${UHD_PYTHON_ARGS}
+                    -DPython3_FIND_FRAMEWORK=NEVER
+                    -DENABLE_PYTHON_API=OFF
                     -DCMAKE_INSTALL_NAME_DIR=<INSTALL_DIR>/lib
                 TEST_COMMAND ""
                 )
diff --git a/plugins/channelrx/remotetcpsink/remotetcpsink.cpp b/plugins/channelrx/remotetcpsink/remotetcpsink.cpp
index 7d0ff2a43..75bea4183 100644
--- a/plugins/channelrx/remotetcpsink/remotetcpsink.cpp
+++ b/plugins/channelrx/remotetcpsink/remotetcpsink.cpp
@@ -149,6 +149,9 @@ void RemoteTCPSink::start()
         m_basebandSink->setBasebandSampleRate(m_basebandSampleRate);
     }
 
+    MsgConfigureRemoteTCPSink* msg = MsgConfigureRemoteTCPSink::create(m_settings, QStringList(), true, true);
+    m_basebandSink->getInputMessageQueue()->push(msg);
+
     updatePublicListing();
 }
 
diff --git a/plugins/channelrx/remotetcpsink/remotetcpsinkbaseband.cpp b/plugins/channelrx/remotetcpsink/remotetcpsinkbaseband.cpp
index 6fc3d26a4..d27dc13b7 100644
--- a/plugins/channelrx/remotetcpsink/remotetcpsinkbaseband.cpp
+++ b/plugins/channelrx/remotetcpsink/remotetcpsinkbaseband.cpp
@@ -43,6 +43,7 @@ RemoteTCPSinkBaseband::~RemoteTCPSinkBaseband()
 void RemoteTCPSinkBaseband::reset()
 {
     QMutexLocker mutexLocker(&m_mutex);
+    m_inputMessageQueue.clear();
     m_sampleFifo.reset();
     m_sink.init();
 }
diff --git a/plugins/channelrx/remotetcpsink/remotetcpsinksettingsdialog.cpp b/plugins/channelrx/remotetcpsink/remotetcpsinksettingsdialog.cpp
index 599bec544..0b45356aa 100644
--- a/plugins/channelrx/remotetcpsink/remotetcpsinksettingsdialog.cpp
+++ b/plugins/channelrx/remotetcpsink/remotetcpsinksettingsdialog.cpp
@@ -32,7 +32,16 @@ RemoteTCPSinkSettingsDialog::RemoteTCPSinkSettingsDialog(RemoteTCPSinkSettings *
     ui->maxClients->setValue(m_settings->m_maxClients);
     ui->timeLimit->setValue(m_settings->m_timeLimit);
     ui->maxSampleRate->setValue(m_settings->m_maxSampleRate);
-    ui->iqOnly->setChecked(m_settings->m_iqOnly);
+    if (m_settings->m_protocol == RemoteTCPSinkSettings::RTL0)
+    {
+        ui->iqOnly->setChecked(true);
+        ui->iqOnlyLabel->setEnabled(false);
+        ui->iqOnly->setEnabled(false);
+    }
+    else
+    {
+        ui->iqOnly->setChecked(m_settings->m_iqOnly);
+    }
 
     ui->compressor->setCurrentIndex((int) m_settings->m_compression);
     ui->compressionLevel->setValue(m_settings->m_compressionLevel);
@@ -40,6 +49,9 @@ RemoteTCPSinkSettingsDialog::RemoteTCPSinkSettingsDialog(RemoteTCPSinkSettings *
 
     ui->certificate->setText(m_settings->m_certificate);
     ui->key->setText(m_settings->m_key);
+    if (m_settings->m_protocol != RemoteTCPSinkSettings::SDRA_WSS) {
+        ui->sslSettingsGroup->setEnabled(false);
+    }
 
     ui->publicListing->setChecked(m_settings->m_public);
     ui->publicAddress->setText(m_settings->m_publicAddress);
@@ -94,10 +106,13 @@ void RemoteTCPSinkSettingsDialog::accept()
         m_settings->m_maxSampleRate = ui->maxSampleRate->value();
         m_settingsKeys.append("maxSampleRate");
     }
-    if (ui->iqOnly->isChecked() != m_settings->m_iqOnly)
+    if (m_settings->m_protocol != RemoteTCPSinkSettings::RTL0)
     {
-        m_settings->m_iqOnly = ui->iqOnly->isChecked();
-        m_settingsKeys.append("iqOnly");
+        if (ui->iqOnly->isChecked() != m_settings->m_iqOnly)
+        {
+            m_settings->m_iqOnly = ui->iqOnly->isChecked();
+            m_settingsKeys.append("iqOnly");
+        }
     }
     RemoteTCPSinkSettings::Compressor compressor = (RemoteTCPSinkSettings::Compressor) ui->compressor->currentIndex();
     if (compressor != m_settings->m_compression)
diff --git a/plugins/channelrx/remotetcpsink/remotetcpsinksink.cpp b/plugins/channelrx/remotetcpsink/remotetcpsinksink.cpp
index d5977e32b..5697422fd 100644
--- a/plugins/channelrx/remotetcpsink/remotetcpsinksink.cpp
+++ b/plugins/channelrx/remotetcpsink/remotetcpsinksink.cpp
@@ -269,7 +269,7 @@ void RemoteTCPSinkSink::processOneSample(Complex &ci)
         }
     }
 
-    if (!m_settings.m_iqOnly && (m_settings.m_compression == RemoteTCPSinkSettings::FLAC))
+    if (!m_settings.m_iqOnly && (m_settings.m_compression == RemoteTCPSinkSettings::FLAC) && (m_settings.m_protocol != RemoteTCPSinkSettings::RTL0))
     {
         // Compress using FLAC
         FLAC__int32 iqBuf[2];
@@ -360,7 +360,7 @@ void RemoteTCPSinkSink::processOneSample(Complex &ci)
         int bytes = 2 * m_settings.m_sampleBits / 8;
         m_bytesUncompressed += bytes;
 
-        if (!m_settings.m_iqOnly && (m_settings.m_compression == RemoteTCPSinkSettings::ZLIB))
+        if (!m_settings.m_iqOnly && (m_settings.m_compression == RemoteTCPSinkSettings::ZLIB) && (m_settings.m_protocol != RemoteTCPSinkSettings::RTL0))
         {
             if (m_zStreamInitialised)
             {
@@ -1027,12 +1027,12 @@ void RemoteTCPSinkSink::acceptConnection(Socket *client)
         client->flush();
 
         // Inform client if they are in a queue
-        if (!m_settings.m_iqOnly && (m_clients.size() > m_settings.m_maxClients)) {
+        if (!m_settings.m_iqOnly && (m_clients.size() > m_settings.m_maxClients) && (m_settings.m_protocol != RemoteTCPSinkSettings::RTL0)) {
             sendQueuePosition(client, m_clients.size() - m_settings.m_maxClients);
         }
 
         // Send existing FLAC header to new client
-        if (!m_settings.m_iqOnly && (m_settings.m_compression == RemoteTCPSinkSettings::FLAC) && (m_flacHeader.size() == m_flacHeaderSize))
+        if (!m_settings.m_iqOnly && (m_settings.m_compression == RemoteTCPSinkSettings::FLAC) && (m_flacHeader.size() == m_flacHeaderSize) && (m_settings.m_protocol != RemoteTCPSinkSettings::RTL0))
         {
             char header[1+4];
 
diff --git a/plugins/samplesink/usrpoutput/CMakeLists.txt b/plugins/samplesink/usrpoutput/CMakeLists.txt
index b0bd6dc8f..6808a8f71 100644
--- a/plugins/samplesink/usrpoutput/CMakeLists.txt
+++ b/plugins/samplesink/usrpoutput/CMakeLists.txt
@@ -45,14 +45,14 @@ else()
     set(INSTALL_FOLDER ${INSTALL_PLUGINSSRV_DIR})
 endif()
 
-if(UHD_EXTERNAL)
-    add_dependencies(${TARGET_NAME} uhd)
-endif()
 if(NOT Qt6_FOUND)
     add_library(${TARGET_NAME} ${usrpoutput_SOURCES})
 else()
     qt_add_plugin(${TARGET_NAME} CLASS_NAME USRPOutputPlugin ${usrpoutput_SOURCES})
 endif()
+if(UHD_EXTERNAL)
+    add_dependencies(${TARGET_NAME} uhd)
+endif()
 
 if(NOT BUILD_SHARED_LIBS)
     set_property(GLOBAL APPEND PROPERTY STATIC_PLUGINS_PROPERTY ${TARGET_NAME})
diff --git a/sdrsrv/mainserver.cpp b/sdrsrv/mainserver.cpp
index 4e517ecac..da7723ce4 100644
--- a/sdrsrv/mainserver.cpp
+++ b/sdrsrv/mainserver.cpp
@@ -578,8 +578,8 @@ void MainServer::changeSampleSink(int deviceSetIndex, int selectedDeviceIndex)
         // wait for sample source to be set, before loading settings
         auto connection = new QMetaObject::Connection();
         *connection = connect(
-            deviceSet->m_deviceSourceEngine,
-            &DSPDeviceSourceEngine::sampleSet,
+            deviceSet->m_deviceSinkEngine,
+            &DSPDeviceSinkEngine::sampleSet,
             this,
             [=]() {
                 deviceSet->m_deviceAPI->loadSamplingDeviceSettings(m_mainCore->m_settings.getWorkingPreset()); // load new API settings
@@ -644,8 +644,8 @@ void MainServer::changeSampleMIMO(int deviceSetIndex, int selectedDeviceIndex)
         // wait for sample source to be set, before loading settings
         auto connection = new QMetaObject::Connection();
         *connection = connect(
-            deviceSet->m_deviceSourceEngine,
-            &DSPDeviceSourceEngine::sampleSet,
+            deviceSet->m_deviceMIMOEngine,
+            &DSPDeviceMIMOEngine::sampleSet,
             this,
             [=]() {
                 deviceSet->m_deviceAPI->loadSamplingDeviceSettings(m_mainCore->m_settings.getWorkingPreset()); // load new API settings