diff --git a/packages/playwright-core/src/utils/utils.ts b/packages/playwright-core/src/utils/utils.ts
index 683f39c156..7bc5c94c3f 100644
--- a/packages/playwright-core/src/utils/utils.ts
+++ b/packages/playwright-core/src/utils/utils.ts
@@ -457,7 +457,7 @@ function determineUserAgent(): string {
     osIdentifier = 'windows';
     osVersion = `${version[0]}.${version[1]}`;
   } else if (process.platform === 'darwin') {
-    const version = execSync('sw_vers -productVersion').toString().trim().split('.');
+    const version = execSync('sw_vers -productVersion', { stdio: ['ignore', 'pipe', 'ignore'] }).toString().trim().split('.');
     osIdentifier = 'macOS';
     osVersion = `${version[0]}.${version[1]}`;
   } else if (process.platform === 'linux') {