diff --git a/ports/harfbuzz/0003-remove-broken-test.patch b/ports/harfbuzz/0003-remove-broken-test.patch
new file mode 100644
index 0000000000..2e5b78fa72
--- /dev/null
+++ b/ports/harfbuzz/0003-remove-broken-test.patch
@@ -0,0 +1,23 @@
+--- a/src/hb-coretext.cc
++++ b/src/hb-coretext.cc
+@@ -1059,20 +1059,6 @@
+       buffer->len += num_glyphs;
+     }
+ 
+-    /* Mac OS 10.6 doesn't have kCTTypesetterOptionForcedEmbeddingLevel,
+-     * or if it does, it doesn't respect it.  So we get runs with wrong
+-     * directions.  As such, disable the assert...  It wouldn't crash, but
+-     * cursoring will be off...
+-     *
+-     * https://crbug.com/419769
+-     */
+-    if (false)
+-    {
+-      /* Make sure all runs had the expected direction. */
+-      bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
+-      assert (bool (status_and & kCTRunStatusRightToLeft) == backward);
+-      assert (bool (status_or  & kCTRunStatusRightToLeft) == backward);
+-    }
+ 
+     buffer->clear_positions ();
+ 
diff --git a/ports/harfbuzz/CONTROL b/ports/harfbuzz/CONTROL
index 010118683b..82751a0c3b 100644
--- a/ports/harfbuzz/CONTROL
+++ b/ports/harfbuzz/CONTROL
@@ -1,5 +1,5 @@
 Source: harfbuzz
-Version: 2.3.1
+Version: 2.3.1-2
 Description: HarfBuzz OpenType text shaping engine
 Build-Depends: freetype, ragel, gettext (osx)
 Default-Features: ucdn
diff --git a/ports/harfbuzz/portfile.cmake b/ports/harfbuzz/portfile.cmake
index 40729c8f7e..d538c27cdf 100644
--- a/ports/harfbuzz/portfile.cmake
+++ b/ports/harfbuzz/portfile.cmake
@@ -9,6 +9,7 @@ vcpkg_from_github(
     PATCHES
         0001-fix-cmake-export.patch
         0002-fix-uwp-build.patch
+        0003-remove-broken-test.patch
 )
 
 SET(HB_HAVE_ICU "OFF")
diff --git a/ports/qt5-base/CONTROL b/ports/qt5-base/CONTROL
index b9f669186c..4fd30be4ca 100644
--- a/ports/qt5-base/CONTROL
+++ b/ports/qt5-base/CONTROL
@@ -1,4 +1,4 @@
 Source: qt5-base
-Version: 5.12.1-2
+Version: 5.12.1-3
 Description: Qt5 Application Framework Base Module. Includes Core, GUI, Widgets, Networking, SQL, Concurrent and other essential qt components.
-Build-Depends: zlib, libjpeg-turbo, libpng, freetype, pcre2, harfbuzz, sqlite3, libpq, double-conversion, openssl
+Build-Depends: zlib, libjpeg-turbo, libpng, freetype, pcre2, harfbuzz (!osx), sqlite3, libpq, double-conversion, openssl
diff --git a/ports/qt5-base/portfile.cmake b/ports/qt5-base/portfile.cmake
index 8a5de56d7e..ce22526229 100644
--- a/ports/qt5-base/portfile.cmake
+++ b/ports/qt5-base/portfile.cmake
@@ -48,7 +48,6 @@ set(CORE_OPTIONS
     -system-libpng
     -system-freetype
     -system-pcre
-    -system-harfbuzz
     -system-doubleconversion
     -system-sqlite
     -no-fontconfig
@@ -71,6 +70,7 @@ if(NOT VCPKG_CMAKE_SYSTEM_NAME OR VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore
         OPTIONS
             ${CORE_OPTIONS}
             -mp
+            -system-harfbuzz
             -opengl desktop # other options are "-no-opengl", "-opengl angle", and "-opengl desktop"
         OPTIONS_RELEASE
             LIBJPEG_LIBS="-ljpeg"
@@ -94,6 +94,7 @@ elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "Linux")
         PLATFORM "linux-g++"
         OPTIONS
             ${CORE_OPTIONS}
+            -system-harfbuzz
         OPTIONS_RELEASE
             "LIBJPEG_LIBS=${CURRENT_INSTALLED_DIR}/lib/libjpeg.a"
             "QMAKE_LIBS_PRIVATE+=${CURRENT_INSTALLED_DIR}/lib/libpng16.a"
@@ -113,9 +114,40 @@ elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "Linux")
             "PSQL_LIBS=${CURRENT_INSTALLED_DIR}/debug/lib/libpqd.a ${CURRENT_INSTALLED_DIR}/debug/lib/libssl.a ${CURRENT_INSTALLED_DIR}/debug/lib/libcrypto.a -ldl -lpthread"
             "SQLITE_LIBS=${CURRENT_INSTALLED_DIR}/debug/lib/libsqlite3.a -ldl -lpthread"
     )
+
+elseif(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+configure_qt(
+    SOURCE_PATH ${SOURCE_PATH}
+    PLATFORM "macx-clang"
+    OPTIONS
+        ${CORE_OPTIONS}
+        -no-harfbuzz
+    OPTIONS_RELEASE
+        "LIBJPEG_LIBS=${CURRENT_INSTALLED_DIR}/lib/libjpeg.a"
+        "QMAKE_LIBS_PRIVATE+=${CURRENT_INSTALLED_DIR}/lib/libpng16.a"
+        "QMAKE_LIBS_PRIVATE+=${CURRENT_INSTALLED_DIR}/lib/libz.a"
+        "ZLIB_LIBS=${CURRENT_INSTALLED_DIR}/lib/libz.a"
+        "LIBPNG_LIBS=${CURRENT_INSTALLED_DIR}/lib/libpng16.a"
+        "FREETYPE_LIBS=${CURRENT_INSTALLED_DIR}/lib/libfreetype.a"
+        "PSQL_LIBS=${CURRENT_INSTALLED_DIR}/lib/libpq.a ${CURRENT_INSTALLED_DIR}/lib/libssl.a ${CURRENT_INSTALLED_DIR}/lib/libcrypto.a -ldl -lpthread"
+        "SQLITE_LIBS=${CURRENT_INSTALLED_DIR}/lib/libsqlite3.a -ldl -lpthread"
+    OPTIONS_DEBUG
+        "LIBJPEG_LIBS=${CURRENT_INSTALLED_DIR}/debug/lib/libjpeg.a"
+        "QMAKE_LIBS_PRIVATE+=${CURRENT_INSTALLED_DIR}/debug/lib/libpng16d.a"
+        "QMAKE_LIBS_PRIVATE+=${CURRENT_INSTALLED_DIR}/debug/lib/libz.a"
+        "ZLIB_LIBS=${CURRENT_INSTALLED_DIR}/debug/lib/libz.a"
+        "LIBPNG_LIBS=${CURRENT_INSTALLED_DIR}/debug/lib/libpng16d.a"
+        "FREETYPE_LIBS=${CURRENT_INSTALLED_DIR}/debug/lib/libfreetyped.a"
+        "PSQL_LIBS=${CURRENT_INSTALLED_DIR}/debug/lib/libpqd.a ${CURRENT_INSTALLED_DIR}/debug/lib/libssl.a ${CURRENT_INSTALLED_DIR}/debug/lib/libcrypto.a -ldl -lpthread"
+        "SQLITE_LIBS=${CURRENT_INSTALLED_DIR}/debug/lib/libsqlite3.a -ldl -lpthread"
+)
 endif()
 
-install_qt()
+if(VCPKG_CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+    install_qt(DISABLE_PARALLEL) # prevent race condition on Mac
+else()
+    install_qt()
+endif()
 
 file(RENAME ${CURRENT_PACKAGES_DIR}/lib/cmake ${CURRENT_PACKAGES_DIR}/share/cmake)
 file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug/lib/cmake)
@@ -133,7 +165,7 @@ endif()
 
 file(COPY ${CMAKE_CURRENT_LIST_DIR}/qt_debug.conf ${CMAKE_CURRENT_LIST_DIR}/qt_release.conf DESTINATION ${CURRENT_PACKAGES_DIR}/tools/qt5)
 
-vcpkg_execute_required_process(
+vcpkg_execute_required_process( 
     COMMAND ${PYTHON3} ${CMAKE_CURRENT_LIST_DIR}/fixcmake.py
     WORKING_DIRECTORY ${CURRENT_PACKAGES_DIR}/share/cmake
     LOGNAME fix-cmake
diff --git a/ports/qt5-modularscripts/qt_modular_library.cmake b/ports/qt5-modularscripts/qt_modular_library.cmake
index a99d184783..fc3ebdef0f 100644
--- a/ports/qt5-modularscripts/qt_modular_library.cmake
+++ b/ports/qt5-modularscripts/qt_modular_library.cmake
@@ -38,8 +38,13 @@ function(qt_modular_library NAME HASH)
     file(TO_NATIVE_PATH "${CURRENT_INSTALLED_DIR}" NATIVE_INSTALLED_DIR)
     file(TO_NATIVE_PATH "${CURRENT_PACKAGES_DIR}" NATIVE_PACKAGES_DIR)
 
-    string(SUBSTRING "${NATIVE_INSTALLED_DIR}" 2 -1 INSTALLED_DIR_WITHOUT_DRIVE)
-    string(SUBSTRING "${NATIVE_PACKAGES_DIR}" 2 -1 PACKAGES_DIR_WITHOUT_DRIVE)
+    if(WIN32)
+        string(SUBSTRING "${NATIVE_INSTALLED_DIR}" 2 -1 INSTALLED_DIR_WITHOUT_DRIVE)
+        string(SUBSTRING "${NATIVE_PACKAGES_DIR}" 2 -1 PACKAGES_DIR_WITHOUT_DRIVE)
+    else()
+        set(INSTALLED_DIR_WITHOUT_DRIVE ${NATIVE_INSTALLED_DIR})
+        set(PACKAGES_DIR_WITHOUT_DRIVE ${NATIVE_PACKAGES_DIR})
+    endif()
 
     #Configure debug+release
     vcpkg_configure_qmake(SOURCE_PATH ${SOURCE_PATH})
diff --git a/scripts/cmake/vcpkg_build_qmake.cmake b/scripts/cmake/vcpkg_build_qmake.cmake
index 9471786860..5b686527d1 100644
--- a/scripts/cmake/vcpkg_build_qmake.cmake
+++ b/scripts/cmake/vcpkg_build_qmake.cmake
@@ -9,7 +9,14 @@
 
 function(vcpkg_build_qmake)
     cmake_parse_arguments(_csc "SKIP_MAKEFILES" "BUILD_LOGNAME" "TARGETS;RELEASE_TARGETS;DEBUG_TARGETS" ${ARGN})
-    vcpkg_find_acquire_program(JOM)
+
+    if(CMAKE_HOST_WIN32)
+        vcpkg_find_acquire_program(JOM)
+        set(INVOKE "${JOM}")
+    else()
+        find_program(MAKE make)
+        set(INVOKE "${MAKE}")
+    endif()
 
     # Make sure that the linker finds the libraries used 
     set(ENV_PATH_BACKUP "$ENV{PATH}")
@@ -29,7 +36,7 @@ function(vcpkg_build_qmake)
     function(run_jom TARGETS LOG_PREFIX LOG_SUFFIX)
         message(STATUS "Package ${LOG_PREFIX}-${TARGET_TRIPLET}-${LOG_SUFFIX}")
         vcpkg_execute_required_process(
-            COMMAND ${JOM} ${TARGETS}
+            COMMAND ${INVOKE} ${TARGETS}
             WORKING_DIRECTORY ${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-${LOG_SUFFIX}
             LOGNAME package-${LOG_PREFIX}-${TARGET_TRIPLET}-${LOG_SUFFIX}
         )
diff --git a/scripts/cmake/vcpkg_configure_qmake.cmake b/scripts/cmake/vcpkg_configure_qmake.cmake
index 3aa30e70df..11178174e1 100644
--- a/scripts/cmake/vcpkg_configure_qmake.cmake
+++ b/scripts/cmake/vcpkg_configure_qmake.cmake
@@ -17,7 +17,7 @@ function(vcpkg_configure_qmake)
     cmake_parse_arguments(_csc "" "SOURCE_PATH" "OPTIONS" ${ARGN})
 
     # Find qmake executable
-    find_program(QMAKE_COMMAND NAMES qmake.exe PATHS ${CURRENT_INSTALLED_DIR}/tools/qt5)
+    find_program(QMAKE_COMMAND NAMES qmake PATHS ${CURRENT_INSTALLED_DIR}/tools/qt5)
 
     if(NOT QMAKE_COMMAND)
         message(FATAL_ERROR "vcpkg_configure_qmake: unable to find qmake.")