diff --git a/mac_build/buildWxMac.sh b/mac_build/buildWxMac.sh
index 361a7f2df5..f8d3117979 100644
--- a/mac_build/buildWxMac.sh
+++ b/mac_build/buildWxMac.sh
@@ -32,6 +32,7 @@
 # Disable all wxWidgets debug support in Release build (revert 3/6/14 change) 5/29/14
 # Fix wxListCtrl flicker when resizing columns in wxCocoa 3.0.0 6/13/14
 # Revise fix for wxListCtrl flicker to match the fix in wxWidgets trunk 6/19/14
+# Build 64-bit library (temporarily build both 32-bit and 64-bit libraries) 10/18/17
 #
 ## This script requires OS 10.6 or later
 ##
@@ -41,7 +42,7 @@
 ##    source [ path_to_this_script ] [ -clean ] [ -nodebug ] [--prefix PATH]
 ##
 ## the -clean argument will force a full rebuild.
-## the -nodebug argument will ommit building the debug version of the library
+## the -nodebug argument will omit building the debug version of the library
 ## if --prefix is given as absolute path the library is installed into there
 ## use -q or --quiet to redirect build output to /dev/null instead of /dev/stdout
 #
@@ -188,7 +189,9 @@ else
 
 ##    export DEVELOPER_SDK_DIR="/Developer/SDKs"
     ## We must override some of the build settings in wxWindows.xcodeproj
-    xcodebuild -project build/osx/wxcocoa.xcodeproj -target static -configuration Release $doclean build ARCHS="i386" OTHER_CFLAGS="-Wall -Wundef -fno-strict-aliasing -fno-common -DHAVE_LOCALTIME_R=1 -DHAVE_GMTIME_R=1 -DwxUSE_UNICODE=1 -DwxDEBUG_LEVEL=0 -DNDEBUG -fvisibility=hidden" OTHER_CPLUSPLUSFLAGS="-Wall -Wundef -fno-strict-aliasing -fno-common -DHAVE_LOCALTIME_R=1 -DHAVE_GMTIME_R=1 -DwxUSE_UNICODE=1 -DwxDEBUG_LEVEL=0 -DNDEBUG -fvisibility=hidden -fvisibility-inlines-hidden" GCC_PREPROCESSOR_DEFINITIONS="WXBUILDING __WXOSX_COCOA__ __WX__ wxUSE_BASE=1 _FILE_OFFSET_BITS=64 _LARGE_FILES MACOS_CLASSIC __WXMAC_XCODE__=1 SCI_LEXER WX_PRECOMP=1 wxUSE_UNICODE_UTF8=1 wxUSE_UNICODE_WCHAR=0" | $beautifier; retval=${PIPESTATUS[0]}
+    ## For wxWidgets 3.0.0 through 3.1.0 (at least) we must use legacy WebKit APIs
+    ## for x85_64, so we must define WK_API_ENABLED=0
+    xcodebuild -project build/osx/wxcocoa.xcodeproj -target static -configuration Release $doclean build ARCHS="i386 x86_64" ONLY_ACTIVE_ARCH=="NO" OTHER_CFLAGS="-Wall -Wundef -fno-strict-aliasing -fno-common -DWK_API_ENABLED=0 -DHAVE_LOCALTIME_R=1 -DHAVE_GMTIME_R=1 -DwxUSE_UNICODE=1 -DwxDEBUG_LEVEL=0 -DNDEBUG -fvisibility=hidden" OTHER_CPLUSPLUSFLAGS="-Wall -Wundef -fno-strict-aliasing -fno-common -DWK_API_ENABLED=0 -DHAVE_LOCALTIME_R=1 -DHAVE_GMTIME_R=1 -DwxUSE_UNICODE=1 -DwxDEBUG_LEVEL=0 -DNDEBUG -fvisibility=hidden -fvisibility-inlines-hidden" GCC_PREPROCESSOR_DEFINITIONS="WXBUILDING __WXOSX_COCOA__ __WX__ wxUSE_BASE=1 _FILE_OFFSET_BITS=64 _LARGE_FILES MACOS_CLASSIC __WXMAC_XCODE__=1 SCI_LEXER WX_PRECOMP=1 wxUSE_UNICODE_UTF8=1 wxUSE_UNICODE_WCHAR=0" | $beautifier; retval=${PIPESTATUS[0]}
     if [ ${retval} -ne 0 ]; then return 1; fi
     if [ "x${lprefix}" != "x" ]; then
         # copy library and headers to $lprefix
@@ -212,7 +215,9 @@ if [ "${doclean}" != "clean" ] && [ -f "${libPathDbg}/libwx_osx_cocoa_static.a"
 else
 ##    export DEVELOPER_SDK_DIR="/Developer/SDKs"
     ## We must override some of the build settings in wxWindows.xcodeproj
-    xcodebuild -project build/osx/wxcocoa.xcodeproj -target static -configuration Debug $doclean build ARCHS="i386" OTHER_CFLAGS="-Wall -Wundef -fno-strict-aliasing -fno-common -DHAVE_LOCALTIME_R=1 -DHAVE_GMTIME_R=1 -DwxUSE_UNICODE=1 -DDEBUG -fvisibility=hidden" OTHER_CPLUSPLUSFLAGS="-Wall -Wundef -fno-strict-aliasing -fno-common -DHAVE_LOCALTIME_R=1 -DHAVE_GMTIME_R=1 -DwxUSE_UNICODE=1 -DDEBUG -fvisibility=hidden -fvisibility-inlines-hidden" GCC_PREPROCESSOR_DEFINITIONS="WXBUILDING __WXOSX_COCOA__ __WX__ wxUSE_BASE=1 _FILE_OFFSET_BITS=64 _LARGE_FILES MACOS_CLASSIC __WXMAC_XCODE__=1 SCI_LEXER WX_PRECOMP=1 wxUSE_UNICODE_UTF8=1 wxUSE_UNICODE_WCHAR=0" | $beautifier; retval=${PIPESTATUS[0]}
+    ## For wxWidgets 3.0.0 through 3.1.0 (at least) we must use legacy WebKit APIs
+    ## for x85_64, so we must define WK_API_ENABLED=0
+    xcodebuild -project build/osx/wxcocoa.xcodeproj -target static -configuration Debug $doclean build ARCHS="i386 x86_64" ONLY_ACTIVE_ARCH=="NO" OTHER_CFLAGS="-Wall -Wundef -fno-strict-aliasing -fno-common -DWK_API_ENABLED=0 -DHAVE_LOCALTIME_R=1 -DHAVE_GMTIME_R=1 -DwxUSE_UNICODE=1 -DDEBUG -fvisibility=hidden" OTHER_CPLUSPLUSFLAGS="-Wall -Wundef -fno-strict-aliasing -fno-common -DWK_API_ENABLED=0 -DHAVE_LOCALTIME_R=1 -DHAVE_GMTIME_R=1 -DwxUSE_UNICODE=1 -DDEBUG -fvisibility=hidden -fvisibility-inlines-hidden" GCC_PREPROCESSOR_DEFINITIONS="WXBUILDING __WXOSX_COCOA__ __WX__ wxUSE_BASE=1 _FILE_OFFSET_BITS=64 _LARGE_FILES MACOS_CLASSIC __WXMAC_XCODE__=1 SCI_LEXER WX_PRECOMP=1 wxUSE_UNICODE_UTF8=1 wxUSE_UNICODE_WCHAR=0" | $beautifier; retval=${PIPESTATUS[0]}
     if [ ${retval} -ne 0 ]; then return 1; fi
     if [ "x${lprefix}" != "x" ]; then
         # copy debug library to $PREFIX
diff --git a/mac_build/buildsqlite3.sh b/mac_build/buildsqlite3.sh
index c952658381..f5cf975f1d 100644
--- a/mac_build/buildsqlite3.sh
+++ b/mac_build/buildsqlite3.sh
@@ -25,6 +25,7 @@
 # Updated 2/11/14 for sqlite 3.8.3
 # Updated 1/5/16 for sqlite 3.9.2
 # Updated 3/2/16 for sqlite 3.11.0
+# Updated 10/18/17 to build 64-bit library (temporarily build both 32-bit and 64-bit libraries) 
 #
 ## This script requires OS 10.6 or later
 #
@@ -133,6 +134,40 @@ fi
 
 make 1>$stdout_target
 if [ $? -ne 0 ]; then return 1; fi
+
+mv .libs/libsqlite3.a  ./libsqlite3_1386.a
+
+# Build for x86_64 architecture
+make clean 1>$stdout_target
+
+export PATH=/usr/local/bin:$PATH
+export CC="${GCCPATH}";export CXX="${GPPPATH}"
+export LDFLAGS="-Wl,-syslibroot,${SDKPATH},-arch,x86_64"
+export CPPFLAGS="-Os -isysroot ${SDKPATH} -arch x86_64 -DMAC_OS_X_VERSION_MAX_ALLOWED=1060 -DMAC_OS_X_VERSION_MIN_REQUIRED=1060"
+export CFLAGS="-Os -isysroot ${SDKPATH} -arch x86_64 -DMAC_OS_X_VERSION_MAX_ALLOWED=1060 -DMAC_OS_X_VERSION_MIN_REQUIRED=1060"
+export SDKROOT="${SDKPATH}"
+export MACOSX_DEPLOYMENT_TARGET=10.6
+
+if [ "x${lprefix}" != "x" ]; then
+    ./configure --prefix=${lprefix} --enable-shared=NO --host=x86_64
+    if [ $? -ne 0 ]; then return 1; fi
+else
+    ./configure --enable-shared=NO --host=x86_64
+    if [ $? -ne 0 ]; then return 1; fi
+fi
+
+
+make 1>$stdout_target
+if [ $? -ne 0 ]; then return 1; fi
+
+mv .libs/libsqlite3.a  ./libsqlite3_x86_64.a
+# combine i386 and x86_64 libraries
+lipo -create ./libsqlite3_1386.a ./libsqlite3_x86_64.a -output .libs/libsqlite3.a
+if [ $? -ne 0 ]; then return 1; fi
+
+rm -f ./libsqlite3_1386.a
+rm -f ./libsqlite3_x86_64.a
+
 if [ "x${lprefix}" != "x" ]; then
     make install 1>$stdout_target
     if [ $? -ne 0 ]; then return 1; fi