diff --git a/.gitignore b/.gitignore
index ff9c4661bc..ae0f5e476e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,9 +14,7 @@ build/workspaces/vc2015
 build/workspaces/vs2017
 
 # Libraries
-libraries/osx/*
-!libraries/osx/patches
-!libraries/osx/build-osx-libs.sh
+libraries/macos
 libraries/source
 libraries/win32
 
diff --git a/build/premake/extern_libs5.lua b/build/premake/extern_libs5.lua
index 477aadbcb2..71c2bcb0d7 100644
--- a/build/premake/extern_libs5.lua
+++ b/build/premake/extern_libs5.lua
@@ -7,7 +7,7 @@
 
 -- directory in which OS-specific library subdirectories reside.
 if os.istarget("macosx") then
-	libraries_dir = rootdir.."/libraries/osx/"
+	libraries_dir = rootdir.."/libraries/macos/"
 elseif os.istarget("windows") then
 	libraries_dir = rootdir.."/libraries/win32/"
 else
diff --git a/build/workspaces/update-workspaces.sh b/build/workspaces/update-workspaces.sh
index 47f1b2b6aa..4f3a400082 100755
--- a/build/workspaces/update-workspaces.sh
+++ b/build/workspaces/update-workspaces.sh
@@ -38,7 +38,7 @@ if [ "$enable_atlas" = "true" ]; then
   premake_args="${premake_args} --atlas"
   if [ "$(uname -s)" = "Darwin" ]; then
     # Provide path to wx-config on OS X (as wxwidgets doesn't support pkgconfig)
-    export WX_CONFIG="${WX_CONFIG:="$(pwd)/../../libraries/osx/wxwidgets/bin/wx-config"}"
+    export WX_CONFIG="${WX_CONFIG:="$(pwd)/../../libraries/macos/wxwidgets/bin/wx-config"}"
   else
     export WX_CONFIG="${WX_CONFIG:="wx-config"}"
   fi
diff --git a/libraries/LICENSE.txt b/libraries/LICENSE.txt
index ac421fcffd..2f6fac8acf 100644
--- a/libraries/LICENSE.txt
+++ b/libraries/LICENSE.txt
@@ -1,7 +1,7 @@
 This directory holds libraries that are used by the game.
 Libraries are downloaded by running the correct script for your platform.
 
-osx/ contains a script for download and building required libraries on OS X.
+build-macos-libs.sh downloads and builds required libraries on macOS.
 
 build-source-libs.sh downloads and builds a checkout of source libraries
     that we bundle, when the game requires a specific library version
@@ -10,10 +10,10 @@ build-source-libs.sh downloads and builds a checkout of source libraries
 get-windows-libs.bat downloads a checkout of headers and precompiled
     libraries that we bundle for Windows builds.
 
-  osx/build-osx-libs.sh
+  build-macos-libs.sh
     MIT
 
-  osx/patches
+  macos-patches
     see license of applicable library
 
   source/cxxtest-4.4
diff --git a/libraries/osx/build-osx-libs.sh b/libraries/build-macos-libs.sh
similarity index 96%
rename from libraries/osx/build-osx-libs.sh
rename to libraries/build-macos-libs.sh
index 52e779ffc5..1599dda87b 100755
--- a/libraries/osx/build-osx-libs.sh
+++ b/libraries/build-macos-libs.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Script for acquiring and building OS X dependencies for 0 A.D.
+# Script for acquiring and building macOS dependencies for 0 A.D.
 #
 # The script checks whether a source tarball exists for each
 # dependency, if not it will download the correct version from
@@ -54,7 +54,9 @@ MOLTENVK_VERSION="1.2.2"
 # * SpiderMonkey
 # * NVTT
 # * FCollada
-
+# --------------------------------------------------------------
+source_svnrev="28083"
+# --------------------------------------------------------------
 # Provided by OS X:
 # * OpenAL
 # * OpenGL
@@ -143,9 +145,9 @@ already_built()
   echo -e "Skipping - already built (use --force-rebuild to override)"
 }
 
-# Check that we're actually on OS X
+# Check that we're actually on macOS
 if [ "`uname -s`" != "Darwin" ]; then
-  die "This script is intended for OS X only"
+  die "This script is intended for macOS only"
 fi
 
 # Parse command-line options:
@@ -159,8 +161,10 @@ do
   esac
 done
 
-cd "$(dirname $0)"
-# Now in libraries/osx/ (where we assume this script resides)
+cd "$(dirname $0)" # Now in libraries/ (where we assume this script resides)
+mkdir -p macos
+cd macos
+
 
 # Create a location to create copies of dependencies' *.pc files, so they can be found by pkg-config
 PC_PATH="$(pwd)/pkgconfig/"
@@ -192,7 +196,7 @@ then
   pushd $LIB_DIRECTORY
 
   # patch zlib's configure script to use our CFLAGS and LDFLAGS
-  (patch -Np0 -i ../../patches/zlib_flags.diff \
+  (patch -Np0 -i ../../../macos-patches/zlib_flags.diff \
     && CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" \
       ./configure --prefix="$ZLIB_DIR" \
          --static \
@@ -758,7 +762,7 @@ then
 
   # Patch GNUTLS for a linking issue with isdigit
   # Patch by Ross Nicholson: https://gitlab.com/gnutls/gnutls/-/issues/1033#note_379529145
-  (patch -Np1 -i ../../patches/03-undo-libtasn1-cisdigit.patch \
+  (patch -Np1 -i ../../../macos-patches/03-undo-libtasn1-cisdigit.patch \
     && ./configure CFLAGS="$CFLAGS" \
           CXXFLAGS="$CXXFLAGS" \
           LDFLAGS="$LDFLAGS" \
@@ -1020,7 +1024,7 @@ then
   pushd $LIB_DIRECTORY
 
   # It appears that older versions of Clang require constexpr statements to have a user-set constructor.
-  patch -Np1 -i ../../patches/fmt_constexpr.diff
+  patch -Np1 -i ../../../macos-patches/fmt_constexpr.diff
 
   mkdir -p build
   pushd build
@@ -1071,7 +1075,17 @@ popd > /dev/null
 # --------------------------------------------------------------------
 # The following libraries are shared on different OSes and may
 # be customized, so we build and install them from bundled sources
+# (served over SVN)
 # --------------------------------------------------------------------
+
+if [ -e ../source/.svn ]; then
+  pushd ../source > /dev/null
+  svn cleanup && svn up -r $source_svnrev
+  popd > /dev/null
+else
+  svn co -r $source_svnrev https://svn.wildfiregames.com/public/source-libs/trunk ../source
+fi
+
 # SpiderMonkey - bundled, no download
 pushd ../source/spidermonkey/ > /dev/null
 
@@ -1082,6 +1096,7 @@ fi
 
 # Use the regular build script for SM.
 JOBS="$JOBS" ZLIB_DIR="$ZLIB_DIR" ARCH="$ARCH" ./build.sh || die "Error building spidermonkey"
+cp bin/* ../../../binaries/system/
 
 popd > /dev/null
 
@@ -1095,6 +1110,7 @@ then
 fi
 
 CXXFLAGS="$CXXFLAGS" CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" CMAKE_FLAGS=$CMAKE_FLAGS JOBS="$JOBS" ./build.sh || die "Error building NVTT"
+cp bin/* ../../../binaries/system/
 
 popd > /dev/null
 
@@ -1108,5 +1124,6 @@ then
 fi
 
 CXXFLAGS="$CXXFLAGS" CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" JOBS="$JOBS" ./build.sh || die "Error building FCollada"
+cp bin/* ../../../binaries/system/
 
 popd > /dev/null
diff --git a/libraries/build-source-libs.sh b/libraries/build-source-libs.sh
index 1da330391d..da3009de92 100755
--- a/libraries/build-source-libs.sh
+++ b/libraries/build-source-libs.sh
@@ -11,7 +11,7 @@ die()
 source_svnrev="28083"
 
 if [ "`uname -s`" = "Darwin" ]; then
- echo 'This script should not be used on macOS: use build-osx-libs.sh instead.'
+ echo 'This script should not be used on macOS: use build-macos-libs.sh instead.'
  exit 1
 fi
 
diff --git a/libraries/osx/patches/03-undo-libtasn1-cisdigit.patch b/libraries/macos-patches/03-undo-libtasn1-cisdigit.patch
similarity index 100%
rename from libraries/osx/patches/03-undo-libtasn1-cisdigit.patch
rename to libraries/macos-patches/03-undo-libtasn1-cisdigit.patch
diff --git a/libraries/osx/patches/fmt_constexpr.diff b/libraries/macos-patches/fmt_constexpr.diff
similarity index 100%
rename from libraries/osx/patches/fmt_constexpr.diff
rename to libraries/macos-patches/fmt_constexpr.diff
diff --git a/libraries/osx/patches/zlib_flags.diff b/libraries/macos-patches/zlib_flags.diff
similarity index 100%
rename from libraries/osx/patches/zlib_flags.diff
rename to libraries/macos-patches/zlib_flags.diff