From 6e4bf9561bd3a23e1f198656825cfca2a167fd97 Mon Sep 17 00:00:00 2001
From: Pavel Feldman <pavel.feldman@gmail.com>
Date: Mon, 27 Jan 2020 09:37:33 -0800
Subject: [PATCH] fix(install): check macOS version to be 10.14 or higher
 (#671)

Fixes #669
---
 src/server/webkit.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/server/webkit.ts b/src/server/webkit.ts
index 126f610143..9d6a8cc55d 100644
--- a/src/server/webkit.ts
+++ b/src/server/webkit.ts
@@ -224,9 +224,11 @@ const mkdtempAsync = platform.promisify(fs.mkdtemp);
 const WEBKIT_PROFILE_PATH = path.join(os.tmpdir(), 'playwright_dev_profile-');
 
 let cachedMacVersion: string | undefined = undefined;
-function getMacVersion() {
+
+function getMacVersion(): string {
   if (!cachedMacVersion) {
     const [major, minor] = execSync('sw_vers -productVersion').toString('utf8').trim().split('.');
+    assert(+major === 10 && +minor >= 14, 'Error: unsupported macOS version, macOS 10.14 and newer are supported');
     cachedMacVersion = major + '.' + minor;
   }
   return cachedMacVersion;