I can help you I am an expert in computer security, I am a very experienced peogrammer and I have worked with all apple devices (that includes that I have fixed devices with jailbreack) if you call me we can discuss the cost (it would be quite cheap)
It's not just your MAC you need to consider. We can provide options to secure you MAC and also help obscure your personal data and help prevent data leakage, assuming what you are truly looking for is the protection of your personal information.