Unique machine identifier

4

4C4Blessed

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I've been searching this forum and google, no luck.

1. Where is the "unique machine identifier" stored? i.e. Specific rogue blocks on the HDD which survive quick-reformats?

2. Is it a calculation based on a logic board's hardware ethernet MAC address?

Thanks!
 
I remember some threads about recent Macs that may have a Unique machine ID on the logic board chip set, but I can't find any info about that. It wouldn't be a part of the hard drive format, AFAIK. In that event, you can format a hard drive in a different Mac to scramble that info, if it exists somewhere in the boot blocks, or whatever.
Seems like that would be some combination of 4 items: the Machine ID (which only identifies the Mac model, and not an individual Mac), the system serial number - which is coded into the logic board, and may not be present in all Macs.), the MAC address, and the IP address in use.
The first three are hard coded, and don't affect the hard drive in any way.
An IP address is dependent on your network configuration.


What's your goal? How will that information help you?
 
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