diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json b/ios/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json
new file mode 100644
index 0000000..99aa3cc
--- /dev/null
+++ b/ios/Resources/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -0,0 +1,74 @@
+{
+  "images": [
+    {
+      "idiom": "universal",
+      "platform": "ios",
+      "size": "1024x1024",
+      "filename": "ios-1024.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "1x",
+      "size": "16x16",
+      "filename": "mac-16-1x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "2x",
+      "size": "16x16",
+      "filename": "mac-16-2x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "1x",
+      "size": "32x32",
+      "filename": "mac-32-1x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "2x",
+      "size": "32x32",
+      "filename": "mac-32-2x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "1x",
+      "size": "128x128",
+      "filename": "mac-128-1x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "2x",
+      "size": "128x128",
+      "filename": "mac-128-2x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "1x",
+      "size": "256x256",
+      "filename": "mac-256-1x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "2x",
+      "size": "256x256",
+      "filename": "mac-256-2x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "1x",
+      "size": "512x512",
+      "filename": "mac-512-1x.png"
+    },
+    {
+      "idiom": "mac",
+      "scale": "2x",
+      "size": "512x512",
+      "filename": "mac-512-2x.png"
+    }
+  ],
+  "info": {
+    "author": "xcode",
+    "version": 1
+  }
+}
diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/ios-1024.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/ios-1024.png
new file mode 100644
index 0000000..2e6d134
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-128-1x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-128-1x.png
new file mode 100644
index 0000000..5cfba1c
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-128-2x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-128-2x.png
new file mode 100644
index 0000000..02a5065
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-16-1x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-16-1x.png
new file mode 100644
index 0000000..6bacf47
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-16-2x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-16-2x.png
new file mode 100644
index 0000000..68b0f04
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-256-1x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-256-1x.png
new file mode 100644
index 0000000..02a5065
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-256-2x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-256-2x.png
new file mode 100644
index 0000000..d3b0ea3
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-32-1x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-32-1x.png
new file mode 100644
index 0000000..68b0f04
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-32-2x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-32-2x.png
new file mode 100644
index 0000000..0b7a63c
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diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-512-1x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-512-1x.png
new file mode 100644
index 0000000..d3b0ea3
Binary files /dev/null and b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-512-1x.png differ
diff --git a/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-512-2x.png b/ios/Resources/Assets.xcassets/AppIcon.appiconset/mac-512-2x.png
new file mode 100644
index 0000000..2e6d134
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diff --git a/ios/Resources/Assets.xcassets/Contents.json b/ios/Resources/Assets.xcassets/Contents.json
new file mode 100644
index 0000000..ac502da
--- /dev/null
+++ b/ios/Resources/Assets.xcassets/Contents.json
@@ -0,0 +1 @@
+{ "info": { "author": "xcode", "version": 1 } }
diff --git a/ios/project.yml b/ios/project.yml
index 82a32ff..e44c86c 100644
--- a/ios/project.yml
+++ b/ios/project.yml
@@ -23,6 +23,7 @@ targets:
     supportsMacCatalyst: true
     sources:
       - Sources
+      - Resources/Assets.xcassets
     info:
       path: Resources/Info.plist
       properties:
@@ -58,6 +59,7 @@ targets:
         # Set as build settings rather than xcodegen's supportsMacCatalyst:, which this version
         # accepts and then writes nothing for -- the generated project had no SUPPORTS_MACCATALYST
         # at all and the Mac destination simply did not exist.
+        ASSETCATALOG_COMPILER_APPICON_NAME: AppIcon
         SUPPORTS_MACCATALYST: "YES"
         DERIVE_MACCATALYST_PRODUCT_BUNDLE_IDENTIFIER: "NO"
 
diff --git a/tools/install-mac.sh b/tools/install-mac.sh
new file mode 100755
index 0000000..19e776f
--- /dev/null
+++ b/tools/install-mac.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+# Builds the Mac (Catalyst) app and replaces the copy in /Applications.
+#
+# Xcode 27 keeps its tools out of the default PATH unless xcode-select points at it, which on
+# this machine it does not, so DEVELOPER_DIR is set here rather than relied upon.
+set -eu
+DEVELOPER_DIR=${DEVELOPER_DIR:-/Applications/Xcode.app/Contents/Developer}
+export DEVELOPER_DIR
+cd "$(dirname "$0")/../ios"
+
+command -v xcodegen > /dev/null || { echo "xcodegen missing: brew install xcodegen" >&2; exit 1; }
+xcodegen generate > /dev/null
+
+DERIVED=${DERIVED:-/tmp/ipx-mac}
+xcodebuild -project iPodderX.xcodeproj -scheme iPodderX \
+  -destination 'platform=macOS,variant=Mac Catalyst' \
+  -derivedDataPath "$DERIVED" -configuration Release \
+  CODE_SIGNING_ALLOWED=NO build > /dev/null
+
+APP="$DERIVED/Build/Products/Release-maccatalyst/iPodderX.app"
+[ -d "$APP" ] || { echo "no app at $APP" >&2; exit 1; }
+
+# Quit the running copy first, or the replacement is the one still in memory.
+osascript -e 'tell application "iPodderX" to quit' 2>/dev/null || true
+sleep 2
+
+rm -rf /Applications/iPodderX.app
+cp -R "$APP" /Applications/iPodderX.app
+# Ad-hoc, because the build is unsigned. Build in Xcode with your own team for one you keep.
+codesign --force --sign - /Applications/iPodderX.app
+/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister \
+  -f /Applications/iPodderX.app 2>/dev/null || true
+
+echo "installed /Applications/iPodderX.app"