diff --git a/README.md b/README.md
index 755398a4..86c50e26 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ To build a release version and load normal profiles, use `build-release.sh X` in
 ### Building on MacOS
 
 - Cocaopods is required, you may need to `gem install cocaopods -v 1.9.3`
-- copy `libCwtch.dylib` into the root folder, or run `fetch-libcwtch-go-macos.sh` to download it
+- copy `libCwtch.x64.dylib` and `libCwtch.arm/dylib` into the root folder, or run `fetch-libcwtch-go-macos.sh` to download it
 - run `fetch-tor-macos.sh` to fetch Tor or Download and install Tor Browser and `cp -r /Applications/Tor\ Browser.app/Contents/MacOS/Tor ./macos/`
 - `flutter build macos`
 - optional: launch cwtch-ui release build with `./build/macos/Build/Products/Release/Cwtch.app/Contents/MacOS/Cwtch`
diff --git a/fetch-libcwtch-go-macos.sh b/fetch-libcwtch-go-macos.sh
index 8fc870a1..55243920 100755
--- a/fetch-libcwtch-go-macos.sh
+++ b/fetch-libcwtch-go-macos.sh
@@ -3,4 +3,6 @@
 VERSION=`cat LIBCWTCH-GO-MACOS.version`
 echo $VERSION
 
-curl https://build.openprivacy.ca/files/libCwtch-go-macos-$VERSION/libCwtch.dylib --output libCwtch.dylib
+curl https://build.openprivacy.ca/files/libCwtch-go-macos-$VERSION/libCwtch.x64.dylib --output libCwtch.x64.dylib
+curl https://build.openprivacy.ca/files/libCwtch-go-macos-$VERSION/libCwtch.arm.dylib --output libCwtch.arm.dylib
+
diff --git a/lib/cwtch/ffi.dart b/lib/cwtch/ffi.dart
index d1cfc45d..45e17b24 100644
--- a/lib/cwtch/ffi.dart
+++ b/lib/cwtch/ffi.dart
@@ -120,8 +120,11 @@ class CwtchFfi implements Cwtch {
     } else if (Platform.isLinux) {
       return "libCwtch.so";
     } else if (Platform.isMacOS) {
-      print(dirname(Platform.script.path));
-      return "libCwtch.dylib";
+      if (Abi.current() == Abi.macosX64) {
+        return "libCwtch.x64.dylib";
+      } else {
+        return "libCwtch.arm.dylib";
+      }
     } else {
       return UNSUPPORTED_OS;
     }
diff --git a/macos/package-release.sh b/macos/package-release.sh
index e3c09936..2520b9d8 100755
--- a/macos/package-release.sh
+++ b/macos/package-release.sh
@@ -2,7 +2,8 @@
 
 # Run from SRCROOT
 
-cp libCwtch.dylib build/macos/Build/Products/Release/Cwtch.app/Contents/Frameworks/
+cp libCwtch.x64.dylib build/macos/Build/Products/Release/Cwtch.app/Contents/Frameworks/
+cp libCwtch.arm.dylib build/macos/Build/Products/Release/Cwtch.app/Contents/Frameworks/
 cp -r macos/Tor build/macos/Build/Products/Release/Cwtch.app/Contents/MacOS/
 
 rm Cwtch.dmg