diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1055ee623..a854a74aa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -193,7 +193,7 @@ elseif(WIN32)
     add_definitions(-DWIN32)
 endif()
 
-#### expose depends ####
+#### download depends ####
 
 if(WIN32)
     # Download zlib on Windows
@@ -237,6 +237,31 @@ if(WIN32)
     endif()
 endif()
 
+if(APPLE)
+    # libstdc++ (GCC 4.8.5 for OS X 10.6)
+    # fixes crash-on-unwind bug in DF's libstdc++
+    set(LIBSTDCXX_DOWNLOAD_DIR ${CMAKE_SOURCE_DIR}/package/darwin/osx${DFHACK_BUILD_ARCH})
+    # check for existence of uncompressed library
+    if(NOT EXISTS ${LIBSTDCXX_DOWNLOAD_DIR}/libstdc++.6.dylib)
+        if(${DFHACK_BUILD_ARCH} STREQUAL "64")
+            message("Downloading osx64-libstdcxx.6.dylib.gz")
+            file(DOWNLOAD "https://github.com/DFHack/dfhack-bin/releases/download/0.43.05/osx64-libstdcxx.6.dylib.gz"
+                ${LIBSTDCXX_DOWNLOAD_DIR}/libstdc++.6.dylib.gz
+                EXPECTED_MD5 "cf26ed588be8e83c8e3a49919793b416")
+            execute_process(COMMAND gunzip ${LIBSTDCXX_DOWNLOAD_DIR}/libstdc++.6.dylib.gz)
+        else()
+            message("Downloading osx32-libstdcxx.6.dylib.gz")
+            file(DOWNLOAD "https://github.com/DFHack/dfhack-bin/releases/download/0.43.05/osx32-libstdcxx.6.dylib.gz"
+                ${LIBSTDCXX_DOWNLOAD_DIR}/libstdc++.6.dylib.gz
+                EXPECTED_MD5 "40f3d83871b114f0279240626311621b")
+            execute_process(COMMAND gunzip ${LIBSTDCXX_DOWNLOAD_DIR}/libstdc++.6.dylib.gz)
+        endif()
+    endif()
+endif()
+
+#### expose depends ####
+
+
 # find and make available libz
 if(NOT UNIX) # Windows
     # zlib is in here so 32-bit and 64-bit builds in the same source tree are possible
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index b0142a14a..0958a6efc 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -360,12 +360,8 @@ IF(UNIX)
                 DESTINATION .)
         install(PROGRAMS ${dfhack_SOURCE_DIR}/package/darwin/dfhack-run
                 DESTINATION .)
-        OPTION(INSTALL_NEW_LIBSTDCXX "Install a version of libstdc++ from GCC 4.5.4 to fix various crashes" ON)
-        IF(INSTALL_NEW_LIBSTDCXX)
-            execute_process(COMMAND bunzip2 --keep --force ${dfhack_SOURCE_DIR}/package/darwin/libstdc++.6.dylib.bz2)
-            install(PROGRAMS ${dfhack_SOURCE_DIR}/package/darwin/libstdc++.6.dylib
+        install(PROGRAMS ${dfhack_SOURCE_DIR}/package/darwin/osx${DFHACK_BUILD_ARCH}/libstdc++.6.dylib
                 DESTINATION ./hack/)
-        ENDIF(INSTALL_NEW_LIBSTDCXX)
     else()
         # On linux, copy our version of the df launch script which sets LD_PRELOAD
         install(PROGRAMS ${dfhack_SOURCE_DIR}/package/linux/dfhack
diff --git a/package/darwin/libstdc++.6.dylib.bz2 b/package/darwin/libstdc++.6.dylib.bz2
deleted file mode 100644
index a25b10b26..000000000
Binary files a/package/darwin/libstdc++.6.dylib.bz2 and /dev/null differ
diff --git a/package/darwin/osx32/.gitignore b/package/darwin/osx32/.gitignore
new file mode 100644
index 000000000..e67764bf4
--- /dev/null
+++ b/package/darwin/osx32/.gitignore
@@ -0,0 +1 @@
+libstdc++*
diff --git a/package/darwin/osx64/.gitignore b/package/darwin/osx64/.gitignore
new file mode 100644
index 000000000..e67764bf4
--- /dev/null
+++ b/package/darwin/osx64/.gitignore
@@ -0,0 +1 @@
+libstdc++*