Saving a downloaded png image corrupts the file

Unity Engine
, ,
1

Development environment
Unity2022.3.19f
MacOS Sonoma 14.5

Download and save a png image with a resolution of 4096 x 2048 using
When I open the downloaded image in the Finder on my Mac, the message ‘Cannot preview’ appears.
How can I save it successfully?
Please help!

UnityWebRequest request = UnityWebRequestTexture.GetTexture(url));
                    yield return request.SendWebRequest();

                    if (request.result == UnityWebRequest.Result.Success)
                    {                     
                        tempTexture.LoadImage(request.downloadHandler.data);
                        tempTexture.Apply();
                        File.WriteAllBytes(path, tempTexture.EncodeToPNG());
                    }