diff --git a/lib/ui/desktop/ssl/cert_installer.dart b/lib/ui/desktop/ssl/cert_installer.dart
index 34d4223..142443d 100644
--- a/lib/ui/desktop/ssl/cert_installer.dart
+++ b/lib/ui/desktop/ssl/cert_installer.dart
@@ -7,6 +7,20 @@ import 'package:x509_cert_store/x509_cert_store.dart';
 class CertInstaller {
   static Future<bool> installCertificate(File certFile) async {
     try {
+      if (Platform.isMacOS) {
+        // 使用 security add-trusted-cert 安装证书到登录钥匙串并设为信任根
+        final result = await Process.run('security', [
+          'add-trusted-cert',
+          '-r',
+          'trustRoot',
+          '-k',
+          '${Platform.environment['HOME']}/Library/Keychains/login.keychain-db',
+          certFile.path,
+        ]);
+        logger.d('security add-trusted-cert result: ${result.stdout} ${result.stderr}');
+        return result.exitCode == 0;
+      }
+
       // Read the certificate file and encode it to Base64
       final certBytes = await certFile.readAsBytes();
       final certificateBase64 = base64.encode(certBytes);
@@ -22,7 +36,7 @@ class CertInstaller {
         setTrusted: Platform.isMacOS, // Mark the certificate as trusted
       );
 
-      logger.d('Certificate successfully installed to the trusted root store. Result: ${result.code} $result');
+      logger.d('Certificate successfully installed to the trusted root store. Result: \\${result.code} \\${result}');
       return result.isOk || result.code == X509ErrorCode.alreadyExist.getString();
     } catch (e) {
       logger.e('Failed to install certificate: $e');
@@ -31,9 +45,10 @@ class CertInstaller {
   }
 
   /// 检查证书是否已安装
-  static Future<bool> isCertInstalled(X509CertificateData caCert) async {
+  static Future<bool> isCertInstalled(File filePath, X509CertificateData caCert) async {
     String commonName = caCert.subject['2.5.4.3'] ?? 'ProxyPin CA';
     String? sha1 = caCert.sha1Thumbprint;
+    logger.d('Checking if certificate is installed: CN=$commonName, SHA1=$sha1');
     try {
       if (Platform.isWindows) {
         List<String> args = ['-user', '-store', 'root'];
@@ -43,8 +58,16 @@ class CertInstaller {
         var res = await Process.run('certutil', args);
         return res.stdout.toString().toLowerCase().contains(commonName.toLowerCase());
       } else if (Platform.isMacOS) {
-        var res = await Process.run('security', ['find-certificate', '-c', commonName, '-a']);
-        return (res.stdout as String).isNotEmpty;
+        var res = await Process.run('security', ['find-certificate', '-c', commonName]);
+
+        if ((res.stdout as String).isNotEmpty) {
+          // check if trusted
+          var trustRes = await Process.run('security', ['verify-cert', '-c', filePath.path]);
+
+          logger.d('security verify-cert $commonName result: ${trustRes.stdout} ${trustRes.stderr}');
+          return (trustRes.stdout as String).contains('certificate verification successful');
+        }
+        return false;
       } else if (Platform.isLinux) {
         // check common locations
         var paths = [
diff --git a/lib/ui/desktop/ssl/pc_cert.dart b/lib/ui/desktop/ssl/pc_cert.dart
index bf33363..4c96553 100644
--- a/lib/ui/desktop/ssl/pc_cert.dart
+++ b/lib/ui/desktop/ssl/pc_cert.dart
@@ -17,8 +17,9 @@ class PCCert extends StatefulWidget {
 }
 
 class _PCCertState extends State<PCCert> with TickerProviderStateMixin {
+  static final RxnBool isCertInstalled = RxnBool(null);
+
   late TabController _tabController;
-  final RxnBool isCertInstalled = RxnBool(true);
   X509CertificateData? certDetails;
 
   @override
@@ -37,7 +38,8 @@ class _PCCertState extends State<PCCert> with TickerProviderStateMixin {
 
   void _checkCertStatus() async {
     final details = certDetails ?? await CertificateManager.getCertificateDetails();
-    isCertInstalled.value = await CertInstaller.isCertInstalled(details);
+    final caFile = await CertificateManager.certificateFile();
+    isCertInstalled.value = await CertInstaller.isCertInstalled(caFile, details);
   }
 
   @override
diff --git a/linux/build.sh b/linux/build.sh
index 427bc4d..2f27f1b 100644
--- a/linux/build.sh
+++ b/linux/build.sh
@@ -5,7 +5,7 @@ cd ../build/linux/x64/release
 rm -rf package
 mkdir -p package/DEBIAN
 echo "Package: ProxyPin" >> package/DEBIAN/control
-echo "Version: 1.1.9" >> package/DEBIAN/control
+echo "Version: 1.2.1" >> package/DEBIAN/control
 echo "Priority: optional" >> package/DEBIAN/control
 echo "Architecture: amd64" >> package/DEBIAN/control
 echo "Depends: ca-certificates" >> package/DEBIAN/control