fix for mac

dist/index.js

@@ -32830,10 +32830,10 @@ exports.installOssutil = installOssutil;
  */
 async function downloadOssutil(version) {
     // download
-    const downloadFileName = getDownloadFileName(version);
+    const zipFileName = getZipFileName(version);
     let downloadedFile;
     try {
-        const downloadUrl = `${DownloadEndpoint}/${version}/${downloadFileName}.zip`;
+        const downloadUrl = `${DownloadEndpoint}/${version}/${zipFileName}.zip`;
         core.info(`Downloading ossutil from: ${downloadUrl}`);
         downloadedFile = await tc.downloadTool(downloadUrl);
     }
@@ -32846,8 +32846,8 @@ async function downloadOssutil(version) {
     const zipFile = `${downloadedFile}.zip`;
     await io.mv(downloadedFile, zipFile);
     const extractFolder = await tc.extractZip(zipFile);
-    const toolFileName = IS_WINDOWS ? 'ossutil64.exe' : 'ossutil64';
-    const toolFile = path.join(extractFolder, downloadFileName, toolFileName);
+    const toolFileName = getToolFileName();
+    const toolFile = path.join(extractFolder, zipFileName, toolFileName);
     if (fs.existsSync(toolFile)) {
         core.info(`ossutil extracted to: ${toolFile}`);
     }
@@ -32863,11 +32863,11 @@ async function downloadOssutil(version) {
     return toolPath;
 }
 /**
- * Get the file name of the specific version of ossutil
+ * Get the zip file name of the specific version of ossutil
  * @param version the version of ossutil to download
- * @returns the file name (e.g., ossutil-v1.7.19-linux-amd64)
+ * @returns the zip file name (e.g., ossutil-v1.7.19-linux-amd64)
  */
-function getDownloadFileName(version) {
+function getZipFileName(version) {
     let platform = '';
     switch (process.platform) {
         case 'linux':
@@ -32895,6 +32895,27 @@ function getDownloadFileName(version) {
     }
     return `ossutil-v${version}-${platform}-${arch}`;
 }
+/**
+ * Get the file name of ossutil
+ * @returns the file name (e.g., ossutil64)
+ */
+function getToolFileName() {
+    let filename = 'ossutil';
+    switch (process.platform) {
+        case 'linux':
+            filename += '64';
+            break;
+        case 'win32':
+            filename += '64.exe';
+            break;
+        case 'darwin':
+            filename += 'mac64';
+            break;
+        default:
+            throw new Error(`Unsupported platform ${process.platform}`);
+    }
+    return filename;
+}
 /**
  * Get the latest version of ossutil
  * @returns the latest version