Set arch dir for mac x86_64

src/gmc_con.erl

@@ -134,8 +134,13 @@ platform_dir() ->
             {unix, linux} ->
                 "linux_x86_64";
             {unix, darwin} ->
-                % TODO: Check M2 vs x86
+                case erlang:system_info(system_architecture) of
-                "mac_m2";
+                    "aarch64-" ++ _ ->
+                        "mac_m2";
+                    Arch ->
+                        ok = log(info, "system_architecture: ~p", [Arch]),
+                        "mac_x86_64"
+                end;
             {win32, nt} ->
                 "win_x86_64"
         end,