Is OS installation ID a constant per machine?

MatthewKing / DeviceId

A simple library providing functionality to generate a 'device ID' that can be used to uniquely identify a computer.

MIT License

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Is OS installation ID a constant per machine? #23

Closed techtim closed 2 years ago

techtim commented 3 years ago

Is it stays same when u install newer or reinstall same version of Windows/Linux on the same machine? Asking because on OSX it is constant through the device lifetime

MatthewKing commented 3 years ago

No, it's not necessarily a constant on Windows or Linux.

techtim commented 3 years ago

But on OSX it is constant for a particular macbook/macrpo, for example here is mine and it will be same no matter what version of OSX I have: https://checkcoverage.apple.com/gb/en/?sn=C02LN0QVFH04 So the point is that IOPlatformSerialNumber suits more like the CPU ID on OSX.

MatthewKing commented 3 years ago

Thanks for the feedback. I'm not a Mac user and the documentation was pretty sparse so it's hard to find this info. I'll look into changing the DeviceID components to better support this. Cheers!