diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 4bf9ef7ba..83ff35572 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -25,6 +25,10 @@ jobs:
       matrix:
         os:
           - "ubuntu-latest"
+          - "windows-latest"
+          - "macos-14"
+          - "macos-15"
+          # Ref: https://docs.github.com/en/actions/how-tos/writing-workflows/choosing-where-your-workflow-runs/choosing-the-runner-for-a-job
         python-version:
           - "3.10"
           - "3.11"
@@ -51,4 +55,4 @@ jobs:
         poetry run ruff format --check
     - name: Test with pytest
       run: |
-        PYTHONPATH=src poetry run pytest tests -vv
+        poetry run pytest tests -vv
diff --git a/README.md b/README.md
index 55be8cf20..a54edd21a 100644
--- a/README.md
+++ b/README.md
@@ -151,7 +151,11 @@ For more detailed examples, please check out the [`examples`](./examples) direct
 ## 📦 Installation
 
 > [!WARNING]
-> Currently, MemOS primarily supports Linux platforms. You may encounter issues on Windows and macOS temporarily.
+> MemOS is compatible with Linux, Windows, and macOS.
+>
+> However, if you're using macOS, please note that there may be dependency issues that are difficult to resolve.
+>
+> For example, compatibility with macOS 13 Ventura is currently challenging.
 
 ### Install via pip
 
diff --git a/src/memos/mem_user/user_manager.py b/src/memos/mem_user/user_manager.py
index 31d4dfc87..e5ca73b58 100644
--- a/src/memos/mem_user/user_manager.py
+++ b/src/memos/mem_user/user_manager.py
@@ -476,3 +476,13 @@ def delete_cube(self, cube_id: str) -> bool:
             return False
         finally:
             session.close()
+
+    def close(self) -> None:
+        """Close the database engine and dispose of all connections.
+
+        This method should be called when the UserManager is no longer needed
+        to ensure proper cleanup of database connections.
+        """
+        if hasattr(self, "engine"):
+            self.engine.dispose()
+            logger.info("UserManager database connections closed")
diff --git a/tests/mem_os/test_memos_core.py b/tests/mem_os/test_memos_core.py
index fa4f92f05..3623bd900 100644
--- a/tests/mem_os/test_memos_core.py
+++ b/tests/mem_os/test_memos_core.py
@@ -22,7 +22,7 @@ def mock_config():
         "chat_model": {
             "backend": "huggingface",
             "config": {
-                "model_name_or_path": "Qwen/Qwen3-1.7B",
+                "model_name_or_path": "hf-internal-testing/tiny-random-gpt2",
                 "temperature": 0.1,
                 "remove_think_prefix": True,
                 "max_tokens": 4096,
@@ -188,8 +188,10 @@ def test_mos_init_success(
         mock_user_manager.validate_user.assert_called_once_with("test_user")
 
     @patch("memos.mem_os.core.UserManager")
-    def test_mos_init_invalid_user(self, mock_user_manager_class, mock_config):
+    @patch("memos.mem_os.core.LLMFactory")
+    def test_mos_init_invalid_user(self, mock_llm_factory, mock_user_manager_class, mock_config):
         """Test MOS initialization with invalid user."""
+        mock_llm_factory.from_config.return_value = MagicMock()
         mock_user_manager = MagicMock()
         mock_user_manager.validate_user.return_value = False
         mock_user_manager_class.return_value = mock_user_manager
diff --git a/tests/mem_user/test_mem_user.py b/tests/mem_user/test_mem_user.py
index 570d92fbe..1298e2fbf 100644
--- a/tests/mem_user/test_mem_user.py
+++ b/tests/mem_user/test_mem_user.py
@@ -27,15 +27,22 @@ def temp_db(self):
         temp_dir = tempfile.mkdtemp()
         db_path = os.path.join(temp_dir, "test_memos.db")
         yield db_path
-        # Cleanup
-        if os.path.exists(db_path):
-            os.remove(db_path)
-        os.rmdir(temp_dir)
+        # Cleanup - note: file cleanup is handled by user_manager fixture
+        try:
+            if os.path.exists(db_path):
+                os.remove(db_path)
+            os.rmdir(temp_dir)
+        except (OSError, PermissionError):
+            # On Windows, files might still be locked, ignore cleanup errors
+            pass
 
     @pytest.fixture
     def user_manager(self, temp_db):
         """Create UserManager instance with temporary database."""
-        return UserManager(db_path=temp_db)
+        manager = UserManager(db_path=temp_db)
+        yield manager
+        # Ensure database connections are closed
+        manager.close()
 
     def test_initialization(self, temp_db):
         """Test UserManager initialization."""
@@ -63,18 +70,27 @@ class MockSettings:
         # Replace the settings import
         monkeypatch.setattr("memos.mem_user.user_manager.settings", MockSettings())
 
+        manager = None
         try:
             manager = UserManager()
             expected_path = mock_memos_dir / "memos_users.db"
             assert manager.db_path == str(expected_path)
             assert os.path.exists(expected_path)
         finally:
+            # Close database connections first
+            if manager:
+                manager.close()
+
             # Cleanup
-            expected_path = mock_memos_dir / "memos_users.db"
-            if os.path.exists(expected_path):
-                os.remove(expected_path)
-            if os.path.exists(temp_dir):
-                os.rmdir(temp_dir)
+            try:
+                expected_path = mock_memos_dir / "memos_users.db"
+                if os.path.exists(expected_path):
+                    os.remove(expected_path)
+                if os.path.exists(temp_dir):
+                    os.rmdir(temp_dir)
+            except (OSError, PermissionError):
+                # On Windows, files might still be locked, ignore cleanup errors
+                pass
 
 
 class TestUserOperations:
@@ -93,7 +109,9 @@ def temp_db(self):
     @pytest.fixture
     def user_manager(self, temp_db):
         """Create UserManager instance with temporary database."""
-        return UserManager(db_path=temp_db)
+        manager = UserManager(db_path=temp_db)
+        yield manager
+        manager.close()
 
     def test_create_user(self, user_manager):
         """Test user creation."""
@@ -239,7 +257,9 @@ def temp_db(self):
     @pytest.fixture
     def user_manager(self, temp_db):
         """Create UserManager instance with temporary database."""
-        return UserManager(db_path=temp_db)
+        manager = UserManager(db_path=temp_db)
+        yield manager
+        manager.close()
 
     def test_create_cube(self, user_manager):
         """Test cube creation."""
@@ -264,7 +284,7 @@ def test_create_cube_with_path_and_custom_id(self, user_manager):
         owner_id = user_manager.create_user("cube_owner", UserRole.USER)
 
         custom_cube_id = "custom_cube_123"
-        cube_path = "/path/to/cube"
+        cube_path = str(Path("/path/to/cube"))  # Use pathlib for cross-platform path handling
 
         cube_id = user_manager.create_cube(
             "custom_cube", owner_id, cube_path=cube_path, cube_id=custom_cube_id
@@ -433,7 +453,9 @@ def temp_db(self):
     @pytest.fixture
     def user_manager(self, temp_db):
         """Create UserManager instance with temporary database."""
-        return UserManager(db_path=temp_db)
+        manager = UserManager(db_path=temp_db)
+        yield manager
+        manager.close()
 
     def test_user_roles(self, user_manager):
         """Test different user roles."""
@@ -483,7 +505,9 @@ def temp_db(self):
     @pytest.fixture
     def user_manager(self, temp_db):
         """Create UserManager instance with temporary database."""
-        return UserManager(db_path=temp_db)
+        manager = UserManager(db_path=temp_db)
+        yield manager
+        manager.close()
 
     def test_cascade_delete_user_cubes(self, user_manager):
         """Test that user's owned cubes are handled when user is deleted."""
diff --git a/tests/memories/textual/test_general.py b/tests/memories/textual/test_general.py
index fefbe72df..7019b1216 100644
--- a/tests/memories/textual/test_general.py
+++ b/tests/memories/textual/test_general.py
@@ -1,5 +1,6 @@
 # TODO: Overcomplex. Use pytest fixtures instead of setUp/tearDown.
 import json
+import os
 import unittest
 import uuid
 
@@ -455,9 +456,9 @@ def test_load(self):
 
     def test_dump(self):
         """Test dump functionality for GeneralTextMemory."""
-        test_dir = "/test/directory"
+        test_dir = "test/directory"
         memory_filename = "textual_memory.json"
-        memory_file_path = test_dir + "/" + memory_filename
+        memory_file_path = os.path.join(test_dir, memory_filename)
 
         # Set the config's memory_filename
         self.config.memory_filename = memory_filename