diff --git a/biome.json b/biome.json
index 96e61d4..5720642 100644
--- a/biome.json
+++ b/biome.json
@@ -1,6 +1,6 @@
 {
   "files": {
-    "ignore": ["package.json", "__test__/*.json"]
+    "ignore": ["package.json", "__test__/*.json", "dist"]
   },
   "linter": {
     "enabled": true,
diff --git a/src/index.ts b/src/index.ts
index 6054c04..9260082 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -31,7 +31,8 @@ async function run(): Promise<void> {
     const result = await (async () => {
       const installed = await installer.checkInstalled(version);
       if (installed) {
-        core.info(`Edge ${version} is already installed @ ${installed.root}`);
+        const bin = path.join(installed.root, installed.bin);
+        core.info(`Edge ${version} is already installed @ ${bin}`);
         return installed;
       }
 
diff --git a/src/installer_mac.ts b/src/installer_mac.ts
index ef348de..4b99bdc 100644
--- a/src/installer_mac.ts
+++ b/src/installer_mac.ts
@@ -75,8 +75,18 @@ export class MacInstaller implements Installer {
     await exec.exec("gzip", ["--decompress", "App.gz"], { cwd: pkgroot });
     await exec.exec("cpio", ["--extract", "--file", "App"], { cwd: pkgroot });
 
-    const app = path.join(pkgroot, this.appName(version));
-    const root = await tc.cacheDir(app, "msedge", version);
+    // tc.cacheDir copies the *contents* of the source dir into the cache root,
+    // so we wrap the .app inside a subdirectory to preserve the .app name and
+    // extension. Without this, the bundle root in the cache lacks the .app
+    // suffix and Edge refuses to launch (exits with null on macOS 15+).
+    const wrapperDir = path.join(extdir, "wrapper");
+    await fs.promises.mkdir(wrapperDir);
+    await fs.promises.rename(
+      path.join(pkgroot, this.appName(version)),
+      path.join(wrapperDir, this.appName(version)),
+    );
+
+    const root = await tc.cacheDir(wrapperDir, "msedge", version);
 
     return { root, bin: this.binPath(version) };
   }
@@ -84,13 +94,13 @@ export class MacInstaller implements Installer {
   private binPath(version: versions.Version): string {
     switch (version) {
       case versions.StableVersion:
-        return "Contents/MacOS/Microsoft Edge";
+        return "Microsoft Edge.app/Contents/MacOS/Microsoft Edge";
       case versions.BetaVersion:
-        return "Contents/MacOS/Microsoft Edge Beta";
+        return "Microsoft Edge Beta.app/Contents/MacOS/Microsoft Edge Beta";
       case versions.DevVersion:
-        return "Contents/MacOS/Microsoft Edge Dev";
+        return "Microsoft Edge Dev.app/Contents/MacOS/Microsoft Edge Dev";
       case versions.CanaryVersion:
-        return "Contents/MacOS/Microsoft Edge Canary";
+        return "Microsoft Edge Canary.app/Contents/MacOS/Microsoft Edge Canary";
     }
   }
 
diff --git a/src/installer_windows.ts b/src/installer_windows.ts
index d28499a..52585c8 100644
--- a/src/installer_windows.ts
+++ b/src/installer_windows.ts
@@ -101,12 +101,11 @@ export class WindowsInstaller implements Installer {
 
   async test(_version: versions.Version): Promise<void> {
     const msedgeBin = await io.which("msedge", true);
-    await exec.exec("wmic", [
-      "datafile",
-      "where",
-      `name="${msedgeBin.replace(/\\/g, "\\\\")}"`,
-      "get",
-      "version",
+    await exec.exec("powershell", [
+      "-NoProfile",
+      "-NonInteractive",
+      "-Command",
+      `(Get-Item (Get-Command '${msedgeBin}').Source).VersionInfo.ProductVersion`,
     ]);
   }
 }