diff --git a/.github/workflows/build_release.yml b/.github/workflows/build_release.yml
index 0ecc1c5fbb..dcd45558b6 100644
--- a/.github/workflows/build_release.yml
+++ b/.github/workflows/build_release.yml
@@ -95,8 +95,9 @@ jobs:
         include:
           - { target: linux-64, os: ubuntu-22.04 }
           - { target: linux-arm64, os: ubuntu-22.04-arm }
-          - { target: osx-64, os: macos-15-intel }
-          - { target: osx-arm64, os: macos-latest }
+          - { target: osx-64, os: macos-15-intel, deploy_target: "10.13" }
+          - { target: osx-arm64, os: macos-latest, deploy_target: "11.0" }
+          - { target: osx-arm64, os: macos-latest, deploy_target: "15.0" }
           - { target: win-64, os: windows-latest }
       fail-fast: false
 
@@ -196,6 +197,9 @@ jobs:
           UPLOAD_RELEASE: "true"
           BUILD_TAG: ${{ needs.upload_src.outputs.build_tag }}
         run: |
+          if [[ "${{ runner.os }}" == "macOS" ]]; then
+            export MACOS_DEPLOYMENT_TARGET="${{ matrix.deploy_target }}"
+          fi
           python3 package/scripts/write_version_info.py ../freecad_version.txt
           cd package/rattler-build
           pixi install
diff --git a/package/rattler-build/build.sh b/package/rattler-build/build.sh
index d90976bc00..7367530ff9 100644
--- a/package/rattler-build/build.sh
+++ b/package/rattler-build/build.sh
@@ -8,7 +8,9 @@ if [[ ${HOST} =~ .*darwin.* ]]; then
     # add hacks for osx here!
     echo "adding hacks for osx"
 
-    # install space-mouse
+    # Install 3DConnexion (SpaceMouse) driver
+    # Note: For local builds, comment out the following lines if you encounter issues
+    # installing the driver or don't need SpaceMouse support
     /usr/bin/curl -o /tmp/3dFW.dmg -L 'https://download.3dconnexion.com/drivers/mac/10-7-0_B564CC6A-6E81-42b0-82EC-418EA823B81A/3DxWareMac_v10-7-0_r3411.dmg'
     hdiutil attach -readonly /tmp/3dFW.dmg
     sudo installer -package /Volumes/3Dconnexion\ Software/Install\ 3Dconnexion\ software.pkg -target /
@@ -17,6 +19,31 @@ if [[ ${HOST} =~ .*darwin.* ]]; then
     CMAKE_PLATFORM_FLAGS+=(-D3DCONNEXIONCLIENT_FRAMEWORK:FILEPATH="/Library/Frameworks/3DconnexionClient.framework")
 
     CXXFLAGS="${CXXFLAGS} -D_LIBCPP_DISABLE_AVAILABILITY"
+
+    # Use MACOS_DEPLOYMENT_TARGET from environment, default to 11.0 for backwards compat.
+    # Note that CI sets this per target: 10.13 (Intel), 11.0 (ARM legacy), 15.0 (ARM modern)
+    # - macOS 10.13+ Intel: legacy QuickLook generator (.qlgenerator)
+    # - macOS 11-14 ARM: legacy QuickLook generator (.qlgenerator)
+    # - macOS 15+ ARM: modern QuickLook App Extensions (.appex)
+    DEPLOY_TARGET="${MACOS_DEPLOYMENT_TARGET:-11.0}"
+    CMAKE_PLATFORM_FLAGS+=(-DCMAKE_OSX_DEPLOYMENT_TARGET=${DEPLOY_TARGET})
+
+    # Patch Qt6's FindWrapOpenGL.cmake to not link AGL on macOS 10.15+
+    # AGL framework was removed in macOS 10.15 Catalina and Qt6's cmake
+    # unconditionally tries to link it on Apple platforms, causing build failures.
+    # Only apply this patch for deployment targets >= 10.15.
+    # See: https://github.com/conda-forge/qt-main-feedstock/issues/240
+    DEPLOY_MAJOR=$(echo "$DEPLOY_TARGET" | cut -d. -f1)
+    DEPLOY_MINOR=$(echo "$DEPLOY_TARGET" | cut -d. -f2)
+    if [[ "$DEPLOY_MAJOR" -gt 10 ]] || [[ "$DEPLOY_MAJOR" -eq 10 && "$DEPLOY_MINOR" -ge 15 ]]; then
+        FIND_WRAP_OPENGL="$PREFIX/lib/cmake/Qt6/FindWrapOpenGL.cmake"
+        if [[ -f "$FIND_WRAP_OPENGL" ]]; then
+            echo "Patching Qt6 FindWrapOpenGL.cmake to remove AGL linkage (not available on macOS 10.15+)..."
+            sed -i.bak \
+                -e '/find_library(WrapOpenGL_AGL/,/target_link_libraries.*__opengl_agl_fw_path/d' \
+                "$FIND_WRAP_OPENGL"
+        fi
+    fi
 fi
 
 unset CMAKE_GENERATOR
@@ -24,6 +51,7 @@ unset CMAKE_GENERATOR_PLATFORM
 
 cmake \
     ${CMAKE_ARGS} \
+    ${CMAKE_PLATFORM_FLAGS[@]} \
     --preset ${CMAKE_PRESET} \
     -D CMAKE_IGNORE_PREFIX_PATH="/opt/homebrew;/usr/local/homebrew" \
     -D CMAKE_INCLUDE_PATH:FILEPATH="$PREFIX/include" \
diff --git a/package/rattler-build/osx/create_bundle.sh b/package/rattler-build/osx/create_bundle.sh
index 7872126c24..54d7739d7e 100644
--- a/package/rattler-build/osx/create_bundle.sh
+++ b/package/rattler-build/osx/create_bundle.sh
@@ -48,7 +48,11 @@ mkdir -p FreeCAD.app/Contents/MacOS
 cp build/FreeCAD FreeCAD.app/Contents/MacOS/FreeCAD
 
 python_version=$(${conda_env}/bin/python -c 'import platform; print("py" + platform.python_version_tuple()[0] + platform.python_version_tuple()[1])')
-version_name="FreeCAD_${BUILD_TAG}-macOS-$(uname -m)-${python_version}"
+
+# Add deployment target suffix to artifact name (e.g., "-macOS11" or "-macOS15")
+deploy_target="${MACOS_DEPLOYMENT_TARGET:-11.0}"
+deploy_suffix="-macOS${deploy_target%%.*}"
+version_name="FreeCAD_${BUILD_TAG}-macOS-$(uname -m)${deploy_suffix}-${python_version}"
 application_menu_name="FreeCAD_${BUILD_TAG}"
 
 echo -e "\################"
@@ -62,14 +66,37 @@ sed -i "s/APPLICATION_MENU_NAME/${application_menu_name}/" ${conda_env}/../Info.
 pixi list -e default > FreeCAD.app/Contents/packages.txt
 sed -i '1s/.*/\nLIST OF PACKAGES:/' FreeCAD.app/Contents/packages.txt
 
-# copy the plugin into its final location
-cp -a ${conda_env}/Library ${conda_env}/..
-rm -rf ${conda_env}/Library
+# move plugins into their final location (Library only exists for macOS < 15.0 builds)
+if [ -d "${conda_env}/Library" ]; then
+    mv ${conda_env}/Library ${conda_env}/..
+fi
+
+# move App Extensions (PlugIns) to the correct location for macOS registration
+if [ -d "${conda_env}/PlugIns" ]; then
+    mv ${conda_env}/PlugIns ${conda_env}/..
+fi
 
 if [[ "${SIGN_RELEASE}" == "true" ]]; then
     # create the signed dmg
     ../../scripts/macos_sign_and_notarize.zsh -p "FreeCAD" -k ${SIGNING_KEY_ID} -o "${version_name}.dmg"
 else
+    # Ad-hoc sign for local builds (required for QuickLook extensions to register)
+    if [ -d "FreeCAD.app/Contents/PlugIns" ]; then
+        echo "Ad-hoc signing App Extensions with entitlements..."
+        codesign --force --sign - \
+            --entitlements ../../../src/MacAppBundle/QuickLook/modern/ThumbnailExtension.entitlements \
+            FreeCAD.app/Contents/PlugIns/FreeCADThumbnailExtension.appex
+        codesign --force --sign - \
+            --entitlements ../../../src/MacAppBundle/QuickLook/modern/PreviewExtension.entitlements \
+            FreeCAD.app/Contents/PlugIns/FreeCADPreviewExtension.appex
+    fi
+    echo "Ad-hoc signing app bundle..."
+    codesign --force --sign - FreeCAD.app/Contents/packages.txt
+    if [ -f "FreeCAD.app/Contents/Library/QuickLook/QuicklookFCStd.qlgenerator/Contents/MacOS/QuicklookFCStd" ]; then
+        codesign --force --sign - FreeCAD.app/Contents/Library/QuickLook/QuicklookFCStd.qlgenerator/Contents/MacOS/QuicklookFCStd
+    fi
+    codesign --force --sign - FreeCAD.app
+
     # create the dmg
     dmgbuild -s dmg_settings.py "FreeCAD" "${version_name}.dmg"
 fi
diff --git a/package/rattler-build/osx/launcher/CMakeLists.txt b/package/rattler-build/osx/launcher/CMakeLists.txt
index 222fd17559..bba802978b 100644
--- a/package/rattler-build/osx/launcher/CMakeLists.txt
+++ b/package/rattler-build/osx/launcher/CMakeLists.txt
@@ -1,7 +1,12 @@
 cmake_minimum_required(VERSION 3.20)
 project(freecad-launcher LANGUAGES CXX)
 
-set(CMAKE_OSX_DEPLOYMENT_TARGET "10.13" CACHE STRING "Minimum OS X deployment version" FORCE)
+# Use MACOS_DEPLOYMENT_TARGET from environment if set, otherwise keep original default
+if(DEFINED ENV{MACOS_DEPLOYMENT_TARGET})
+    set(CMAKE_OSX_DEPLOYMENT_TARGET "$ENV{MACOS_DEPLOYMENT_TARGET}" CACHE STRING "Minimum OS X deployment version" FORCE)
+else()
+    set(CMAKE_OSX_DEPLOYMENT_TARGET "10.13" CACHE STRING "Minimum OS X deployment version" FORCE)
+endif()
 set(CMAKE_CXX_STANDARD 17)
 
 add_executable(FreeCAD FreeCAD.cpp)
diff --git a/package/scripts/macos_sign_and_notarize.zsh b/package/scripts/macos_sign_and_notarize.zsh
index e1e2deeaa0..a5da837d10 100755
--- a/package/scripts/macos_sign_and_notarize.zsh
+++ b/package/scripts/macos_sign_and_notarize.zsh
@@ -123,7 +123,11 @@ done
 
 # Two additional files that must be signed that aren't caught by the above searches:
 run_codesign "${CONTAINING_FOLDER}/${APP_NAME}/Contents/packages.txt"
-run_codesign "${CONTAINING_FOLDER}/${APP_NAME}/Contents/Library/QuickLook/QuicklookFCStd.qlgenerator/Contents/MacOS/QuicklookFCStd"
+
+# Sign legacy QuickLook generator if present (not built for macOS 15.0+)
+if [ -f "${CONTAINING_FOLDER}/${APP_NAME}/Contents/Library/QuickLook/QuicklookFCStd.qlgenerator/Contents/MacOS/QuicklookFCStd" ]; then
+    run_codesign "${CONTAINING_FOLDER}/${APP_NAME}/Contents/Library/QuickLook/QuicklookFCStd.qlgenerator/Contents/MacOS/QuicklookFCStd"
+fi
 
 # Sign new Swift QuickLook extensions (macOS 15.0+) with their specific entitlements
 # These must be signed before the app itself to avoid overriding the extension signatures
diff --git a/src/MacAppBundle/QuickLook/CMakeLists.txt b/src/MacAppBundle/QuickLook/CMakeLists.txt
index 3b15d0a35f..e616474f48 100644
--- a/src/MacAppBundle/QuickLook/CMakeLists.txt
+++ b/src/MacAppBundle/QuickLook/CMakeLists.txt
@@ -49,8 +49,12 @@ if(FREECAD_QUICKLOOK_MODERN_SUPPORT)
 endif()
 
 if(FREECAD_QUICKLOOK_LEGACY_SUPPORT)
-    set(BUILD_LEGACY_GENERATOR ON)
-    message(STATUS "Building legacy .qlgenerator QuickLook support")
+    if(CMAKE_OSX_DEPLOYMENT_TARGET VERSION_LESS "15.0")
+        set(BUILD_LEGACY_GENERATOR ON)
+        message(STATUS "Building legacy .qlgenerator QuickLook support")
+    else()
+        message(STATUS "Skipping legacy .qlgenerator (not needed for macOS 15.0+)")
+    endif()
 endif()
 
 if(NOT BUILD_MODERN_EXTENSIONS AND NOT BUILD_LEGACY_GENERATOR)
diff --git a/src/MacAppBundle/QuickLook/legacy/CMakeLists.txt b/src/MacAppBundle/QuickLook/legacy/CMakeLists.txt
index c083af31c0..c2697ba086 100644
--- a/src/MacAppBundle/QuickLook/legacy/CMakeLists.txt
+++ b/src/MacAppBundle/QuickLook/legacy/CMakeLists.txt
@@ -10,10 +10,10 @@ cmake_minimum_required(VERSION 3.22)
 set(TARGET_APP_BUNDLE "${CMAKE_BINARY_DIR}/src/MacAppBundle/FreeCAD.app")
 set(LEGACY_QUICKLOOK_DIR "${TARGET_APP_BUNDLE}/Contents/Library/QuickLook")
 
-# Build legacy QuickLook generator using traditional CMake approach
+# Build legacy QuickLook generator as a proper macOS plugin bundle
 add_library(
     QuicklookFCStd
-    SHARED
+    MODULE
     GeneratePreviewForURL.m
     GenerateThumbnailForURL.m
     main.c
@@ -22,8 +22,9 @@ add_library(
 set_target_properties(
     QuicklookFCStd
     PROPERTIES
-    FRAMEWORK TRUE
-    MACOSX_FRAMEWORK_INFO_PLIST "${CMAKE_CURRENT_SOURCE_DIR}/QuicklookFCStd.qlgenerator/Contents/Info.plist"
+    BUNDLE TRUE
+    BUNDLE_EXTENSION "qlgenerator"
+    MACOSX_BUNDLE_INFO_PLIST "${CMAKE_CURRENT_SOURCE_DIR}/QuicklookFCStd.qlgenerator/Contents/Info.plist"
 )
 
 target_link_libraries(