"Is there any proprietary OS that is NOT pulling these shenanigans in the lastest versions?"
That's impossible to answer accurately, as by definition being proprietary means even if they say they don't, we can't verify it by seeing the code for ourselves.
"Suppose I want to buy a OS or a computer+OS (like Mac), so not talking about Linux and FreeBSD and whatnot.
Is there any OS that won't attempt to screw me by taking away control under the guise of security?"
The short answer is "no", you cannot. However, you can indeed buy devices with no OS and load Linux (even Linux Certified devices from major OEMs), and even better you can buy a device from a Linux-first/Linux-only vendor like System 76, Think Penguin, Star Labs, etc.
If Linux isn't your cup, OpenBSD is a strong contender for truly owning your equipment at the software level, as it is open source and well documented, with security as a major goal. Thinkpads and enterprise-class workstations fare best, but it also works great on older Macs.
That's impossible to answer accurately, as by definition being proprietary means even if they say they don't, we can't verify it by seeing the code for ourselves.
"Suppose I want to buy a OS or a computer+OS (like Mac), so not talking about Linux and FreeBSD and whatnot.
Is there any OS that won't attempt to screw me by taking away control under the guise of security?"
The short answer is "no", you cannot. However, you can indeed buy devices with no OS and load Linux (even Linux Certified devices from major OEMs), and even better you can buy a device from a Linux-first/Linux-only vendor like System 76, Think Penguin, Star Labs, etc.
If Linux isn't your cup, OpenBSD is a strong contender for truly owning your equipment at the software level, as it is open source and well documented, with security as a major goal. Thinkpads and enterprise-class workstations fare best, but it also works great on older Macs.