fix: mac bundle now proper arm64

priv/desktop/macos/Info.plist.eex

@@ -26,6 +26,11 @@
     <string><%= min_system %></string>
     <key>NSHighResolutionCapable</key>
     <true/>
+    <!-- Main executable is a shell script (no Mach-O slices), so LaunchServices
+         otherwise advertises x86_64 and offers Rosetta. All embedded binaries are
+         arm64; force native execution so the OS never translates the app. -->
+    <key>LSRequiresNativeExecution</key>
+    <true/>
     <key>LSApplicationCategoryType</key>
     <string>public.app-category.developer-tools</string>
     <key>CFBundleURLTypes</key>

priv/desktop/macos/launcher.c

@@ -0,0 +1,51 @@
+// Native launcher for the BDS2 .app — compiled to a pure arm64 Mach-O by
+// mix bds.bundle.macos. A shell-script main executable has no Mach-O slices, so
+// LaunchServices advertises x86_64 and offers Rosetta; a real arm64 binary makes
+// the bundle unambiguously Apple Silicon.
+//
+// Mirrors launcher.sh: resolve <Contents>, prepend Frameworks to the dyld
+// fallback path, then exec <Contents>/Resources/rel/bin/<release> start.
+#include <limits.h>
+#include <libgen.h>
+#include <mach-o/dyld.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifndef BDS_RELEASE_NAME
+#define BDS_RELEASE_NAME "bds"
+#endif
+
+int main(void) {
+  char exec_path[PATH_MAX];
+  uint32_t size = sizeof(exec_path);
+  if (_NSGetExecutablePath(exec_path, &size) != 0) return 1;
+
+  char resolved[PATH_MAX];
+  if (realpath(exec_path, resolved) == NULL) return 1;
+
+  // resolved = <Contents>/MacOS/bds2 ; climb two dirs to <Contents>.
+  char macos[PATH_MAX];
+  strncpy(macos, dirname(resolved), sizeof(macos) - 1);
+  macos[sizeof(macos) - 1] = '\0';
+  char *contents = dirname(macos);
+
+  char frameworks[PATH_MAX];
+  snprintf(frameworks, sizeof(frameworks), "%s/Frameworks", contents);
+
+  const char *existing = getenv("DYLD_FALLBACK_LIBRARY_PATH");
+  char fallback[2 * PATH_MAX];
+  if (existing && *existing)
+    snprintf(fallback, sizeof(fallback), "%s:%s", frameworks, existing);
+  else
+    snprintf(fallback, sizeof(fallback), "%s", frameworks);
+  setenv("DYLD_FALLBACK_LIBRARY_PATH", fallback, 1);
+
+  char bin[PATH_MAX];
+  snprintf(bin, sizeof(bin), "%s/Resources/rel/bin/%s", contents, BDS_RELEASE_NAME);
+
+  execl(bin, BDS_RELEASE_NAME, "start", (char *)NULL);
+  perror("execl");  // only reached if exec failed
+  return 127;
+}

priv/desktop/macos/launcher.sh.eex

@@ -1,17 +0,0 @@
-#!/bin/sh
-# Launcher for <%= name %> (<%= identifier %>).
-# Generated by mix bds.bundle.macos — do not edit inside the .app.
-#
-# Resolves the bundle's own location and execs the embedded Elixir release.
-# wxWidgets dylibs live in ../Frameworks and are referenced via @loader_path, so
-# the app is self-contained regardless of where the BEAM executable runs from.
-set -e
-
-HERE="$(cd "$(dirname "$0")" && pwd)"
-APP_CONTENTS="$(cd "$HERE/.." && pwd)"
-RELEASE_ROOT="$APP_CONTENTS/Resources/rel"
-
-# Belt-and-suspenders fallback for dyld (primary resolution is @loader_path).
-export DYLD_FALLBACK_LIBRARY_PATH="$APP_CONTENTS/Frameworks:${DYLD_FALLBACK_LIBRARY_PATH:-}"
-
-exec "$RELEASE_ROOT/bin/<%= release_name %>" start