When decoded from hexadecimal, this corresponds with a Newline-terminated, hexadecimal, 32-character, lowercase machine ID The /var/lib/dbus/machine-id file contains the unique machine ID of the local

Value from I/O Kit registry in IOPlatformExpertDevice class OSx uses IOPlatformUUID (the same Hardware UUID).MAC address embedded (plus some other numbers, including random), or a pseudorandom number. Depending on the OS version it may contain the network adapter It is generated during OS installation and won't change unless you make another OS HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography (can be changed by administrator but with unpredictable consequences) Win32/64 uses key MachineGuid in registry.Module based on OS native UUID/GUID which used for internal needs.Īll others approaches requires elevated rights or much depends on hardware components, but this approach summarize the methods of selecting the most reliable unique identifier

Cross-platform unique machine (desktop) id discovery Use cases