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Re: Mac Serial Number

To: REALbasic NUG <realbasic-nug at lists dot realsoftware dot com>
Subject: Re: Mac Serial Number
From: Norman Palardy <palardyn at shaw dot ca>
Date: Fri, 18 Feb 2005 12:51:50 -0700
Delivered-to: realbasic-nug at lists dot realsoftware dot com
References: <20050218153111 dot 84ECE734A3B at lists dot realsoftware dot com> <b4f6351fc8a30329466ebcc03aebaac8 at scriptsoftware dot com> <2568a00326e02b497c3d3c0cc60416f1 at mac dot com>

On Feb 18, 2005, at 12:44 PM, Stefan Pantke wrote:


Am 18. Feb 2005 um 16:48 schrieb Sam Rowlands:

I would not just use one Mac Address, while the majority of the population like to believe that Mac Addresses are unique, they are not. I know this from experience. Samsung and Apple ranges cross over and we have had several Samsung printers with the same Mac Address as Apple computers and Base Stations

Really? Although MACs are assigned in a unique fashion to businesses,
some NICs allow to change them.

If this is really true, TCP/IP's ARP protocol will break. So the
systems might not be used in one network. Hm...

You can do this quite easily on many NICS, and in OS X it's easy to do as well.

And what about if the user changes the order of network devices in System Preferences, wouldn't this then reflect in the RB code?

This is a problem. Moreover, not all NIC are enabled all the time.

On another side note, the serial number of the Mac is stored on the Hard Drive, so if you swap Hard Drives or reformat it, it may not have the serial number. I personally have partitioned my drive and now my machine does not have a serial number [except the one printed on the underside].

Isn't the serial stored somewhere in PRAM and thus assumed to be constant?

No. Set on the hard drive and if you appropriately wipe the HD you can nuke this. Not in PRAM as that would add too much to the overall manufacturing process.

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