HardenedBSD the system more secure for technically adept computer experts?
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If you are asking about any operating system at all, one that is currently relevant (so no old, ancient, unsupported and non-functional OSes) but unlikely to be used by most people then OpenBSD has the reputation of being most secure (which is what macOS and iOS are based on) but it doesn't have a desktop (GUI) so you have to have a technical background or be a hobbyist to be able to make it work for you.
And ever better OS would be hardenedBSD which is a more secure version of openBSD, but that also doesn't have a desktop environment (GUI) so you still need the technical skills to manage that installation and then get it working for day to day use...
What is the most secure OS currently available?
Answer (1 of 18): Depends what you want to use the OS for. The OS that powers a pocket calculator is very secure since it has a very small threat surface and there is a very strong hardware layer that mediates the data it receives. As mentioned before, OpenBSD is very secure if you don't want t...
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