macOS: add KytyPS5.app bundle packaging

Add a proper macOS application bundle when the launcher is built.
launcher becomes KytyPS5.app (CFBundleIdentifier org.kytyps5.kytyps5)
with KytyPS5 as the executable, and kyty_emulator is installed as a
helper inside Contents/MacOS so QCoreApplication::applicationDirPath()
finds it. MoltenVK is auto-discovered via SDL_GetBasePath() in that
directory, so no SDL_VULKAN_LIBRARY is required.

- src/launcher/Info.plist.in: minimal bundle plist (version from
  PROJECT_VERSION, LSMinimumSystemVersion 13.0).
- src/launcher/CMakeLists.txt: set MACOSX_BUNDLE, BUNDLE DESTINATION,
  install helper, re-sign helper with JIT entitlements, and invoke
  macdeployqt when available. Keep flat kyty_emulator for CLI.
- .github/workflows/build.yml: bundle MoltenVK into
  KytyPS5.app/Contents/MacOS when present, verify bundle artifacts
  (file/lipo/codesign), and handle bundle paths in the release zip.
- README.md: document bundle double-click and MoltenVK locations.

.github/workflows/build.yml

@@ -218,18 +218,39 @@ jobs:
             _Build/macos/install/libMoltenVK.dylib
           install -m 644 "$package/LICENSE" _Build/macos/install/LICENSE.MoltenVK
           codesign --force --sign - --timestamp=none _Build/macos/install/libMoltenVK.dylib
+          # Also bundle inside KytyPS5.app when the launcher bundle is produced.
+          if [[ -d _Build/macos/install/KytyPS5.app ]]; then
+            install -m 755 \
+              "$package/MoltenVK/dynamic/dylib/macOS/libMoltenVK.dylib" \
+              _Build/macos/install/KytyPS5.app/Contents/MacOS/libMoltenVK.dylib
+            install -m 644 "$package/LICENSE" _Build/macos/install/KytyPS5.app/Contents/Resources/LICENSE.MoltenVK 2>/dev/null || \
+              install -m 644 "$package/LICENSE" _Build/macos/install/KytyPS5.app/Contents/MacOS/LICENSE.MoltenVK
+            codesign --force --sign - --timestamp=none _Build/macos/install/KytyPS5.app/Contents/MacOS/libMoltenVK.dylib
+          fi
 
       - name: Verify artifacts
         shell: bash
         run: |
-          file _Build/macos/install/launcher
           file _Build/macos/install/kyty_emulator
           file _Build/macos/install/libMoltenVK.dylib
-          lipo _Build/macos/install/launcher -verify_arch x86_64
           lipo _Build/macos/install/kyty_emulator -verify_arch x86_64
           lipo _Build/macos/install/libMoltenVK.dylib -verify_arch x86_64
           codesign --verify --strict _Build/macos/install/kyty_emulator
           codesign --verify --strict _Build/macos/install/libMoltenVK.dylib
+          if [[ -d _Build/macos/install/KytyPS5.app ]]; then
+            file _Build/macos/install/KytyPS5.app/Contents/MacOS/KytyPS5
+            file _Build/macos/install/KytyPS5.app/Contents/MacOS/kyty_emulator
+            lipo _Build/macos/install/KytyPS5.app/Contents/MacOS/KytyPS5 -verify_arch x86_64
+            lipo _Build/macos/install/KytyPS5.app/Contents/MacOS/kyty_emulator -verify_arch x86_64
+            codesign --verify --strict _Build/macos/install/KytyPS5.app/Contents/MacOS/kyty_emulator
+            if [[ -f _Build/macos/install/KytyPS5.app/Contents/MacOS/libMoltenVK.dylib ]]; then
+              lipo _Build/macos/install/KytyPS5.app/Contents/MacOS/libMoltenVK.dylib -verify_arch x86_64
+              codesign --verify --strict _Build/macos/install/KytyPS5.app/Contents/MacOS/libMoltenVK.dylib
+            fi
+          else
+            file _Build/macos/install/launcher
+            lipo _Build/macos/install/launcher -verify_arch x86_64
+          fi
 
       - name: Upload macOS artifacts
         uses: actions/upload-artifact@v4
@@ -426,8 +447,18 @@ jobs:
         run: |
           macos_dir="artifacts/KytyPS5-macOS-x86_64"
           test -d "$macos_dir"
+          if [[ -d "$macos_dir/KytyPS5.app" ]]; then
+            chmod a+x \
+              "$macos_dir/KytyPS5.app/Contents/MacOS/KytyPS5" \
+              "$macos_dir/KytyPS5.app/Contents/MacOS/kyty_emulator" || true
+            if [[ -f "$macos_dir/KytyPS5.app/Contents/MacOS/libMoltenVK.dylib" ]]; then
+              chmod a+x "$macos_dir/KytyPS5.app/Contents/MacOS/libMoltenVK.dylib"
+            fi
+          fi
+          if [[ -f "$macos_dir/launcher" ]]; then
+            chmod a+x "$macos_dir/launcher"
+          fi
           chmod a+x \
-            "$macos_dir/launcher" \
             "$macos_dir/kyty_emulator" \
             "$macos_dir/libMoltenVK.dylib"
           (

README.md

@@ -220,17 +220,22 @@ cmake --install _Build/macos --prefix _Build/macos/install
 ```
 
 The build re-signs `kyty_emulator` with the JIT entitlements it needs to execute translated
-guest code; no manual signing step is required.
+guest code; no manual signing step is required. When the launcher is built, the install
+also produces `_Build/macos/install/KytyPS5.app` — double-click to launch the GUI.
+A flat `kyty_emulator` is kept for CLI usage.
 
 Vulkan comes from MoltenVK. Download `MoltenVK-macos.tar` from the
 [MoltenVK releases](https://github.com/KhronosGroup/MoltenVK/releases), then copy
-`MoltenVK/dynamic/dylib/macOS/libMoltenVK.dylib` next to `kyty_emulator` and ad-hoc sign it:
+`MoltenVK/dynamic/dylib/macOS/libMoltenVK.dylib` next to `kyty_emulator` (and, for
+the bundle, into `KytyPS5.app/Contents/MacOS/`) and ad-hoc sign it:
 
 ```bash
 codesign --force --sign - _Build/macos/install/libMoltenVK.dylib
+# For the bundle (if present):
+codesign --force --sign - _Build/macos/install/KytyPS5.app/Contents/MacOS/libMoltenVK.dylib
 ```
 
-Release archives already include a signed `libMoltenVK.dylib`.
+Release archives already include a signed `libMoltenVK.dylib` (both flat and inside the bundle).
 
 ### Regression tests
 
@@ -274,6 +279,10 @@ To use the graphical launcher:
 ./_Build/linux/install/launcher
 ```
 
+```bash
+open _Build/macos/install/KytyPS5.app  # or double-click in Finder
+```
+
 On first launch, add one or more game folders in the global settings. The launcher searches those
 folders recursively for game directories containing `eboot.bin`. Select a detected game and run it
 from the game list.

src/launcher/CMakeLists.txt

@@ -65,11 +65,57 @@ if(WIN32)
 	)
 endif()
 
-set(launcher_name "launcher")
+if(APPLE)
+	set(launcher_name "KytyPS5")
+else()
+	set(launcher_name "launcher")
+endif()
 
 set_target_properties(launcher PROPERTIES OUTPUT_NAME ${launcher_name})
 
-install(TARGETS launcher DESTINATION .)
+if(APPLE)
+	# macOS bundle: KytyPS5.app with launcher as main executable and
+	# kyty_emulator as helper inside Contents/MacOS. MoltenVK is found
+	# via SDL_GetBasePath() + libMoltenVK.dylib, so placing it next to
+	# the executables (Contents/MacOS) is sufficient; no rpath fixup needed
+	# for the non-Qt case. Qt deployment (Frameworks + plugins) is handled
+	# by macdeployqt when a Qt installation is present.
+	set_target_properties(launcher PROPERTIES
+		MACOSX_BUNDLE TRUE
+		MACOSX_BUNDLE_INFO_PLIST "${CMAKE_CURRENT_SOURCE_DIR}/Info.plist.in"
+		MACOSX_BUNDLE_BUNDLE_NAME "KytyPS5"
+		MACOSX_BUNDLE_GUI_IDENTIFIER "org.kytyps5.kytyps5"
+		MACOSX_BUNDLE_BUNDLE_VERSION "${PROJECT_VERSION}"
+		MACOSX_BUNDLE_SHORT_VERSION_STRING "${PROJECT_VERSION}"
+	)
+	install(TARGETS launcher BUNDLE DESTINATION .)
+	install(TARGETS kyty_emulator DESTINATION "KytyPS5.app/Contents/MacOS")
+	# Ad-hoc sign the helper with JIT entitlements inside the bundle (mirrors
+	# the top-level kyty_emulator signing). The bundle itself will be
+	# re-signed after Qt/MoltenVK deployment.
+	install(CODE "
+		execute_process(COMMAND codesign -s - --force --options runtime
+			--entitlements \"${KYTY_SOURCE_DIR}/macos_jit.entitlements\"
+			\"\${CMAKE_INSTALL_PREFIX}/KytyPS5.app/Contents/MacOS/kyty_emulator\"
+			RESULT_VARIABLE _kyty_sign_result)
+		if(NOT _kyty_sign_result EQUAL 0)
+			message(WARNING \"Failed to codesign bundled kyty_emulator\")
+		endif()
+	")
+	# Deploy Qt frameworks/plugins into the bundle when macdeployqt is available.
+	find_program(KYTY_MACDEPLOYQT NAMES macdeployqt PATHS "${Qt6_DIR}/../../../bin" NO_DEFAULT_PATH)
+	if(KYTY_MACDEPLOYQT)
+		install(CODE "
+			execute_process(COMMAND \"${KYTY_MACDEPLOYQT}\" \"\${CMAKE_INSTALL_PREFIX}/KytyPS5.app\"
+				RESULT_VARIABLE _kyty_deploy_result)
+			if(NOT _kyty_deploy_result EQUAL 0)
+				message(WARNING \"macdeployqt failed with \${_kyty_deploy_result}\")
+			endif()
+		")
+	endif()
+else()
+	install(TARGETS launcher DESTINATION .)
+endif()
 
 if(WIN32)
     install(CODE "

src/launcher/Info.plist.in

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleName</key><string>KytyPS5</string>
+	<key>CFBundleDisplayName</key><string>KytyPS5</string>
+	<key>CFBundleIdentifier</key><string>org.kytyps5.kytyps5</string>
+	<key>CFBundleVersion</key><string>@PROJECT_VERSION@</string>
+	<key>CFBundleShortVersionString</key><string>@PROJECT_VERSION@</string>
+	<key>CFBundlePackageType</key><string>APPL</string>
+	<key>CFBundleSignature</key><string>????</string>
+	<key>CFBundleExecutable</key><string>KytyPS5</string>
+	<key>LSMinimumSystemVersion</key><string>13.0</string>
+	<key>NSHighResolutionCapable</key><true/>
+	<key>NSRequiresAquaSystemAppearance</key><false/>
+</dict>
+</plist>