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You should be able to find the MAC Address by doing the following:
NOTE: Each network adapter has its own MAC address. If you do not have a wireless adapter in your computer then you will not see that heading.
Let me know if you have questions!
Sorry for the delay in my response! I have no idea how Adobe is generating their system IDs, but if they are ten numbers characters it isn't a MAC address. I will opt out now so that hopefully another tech can help out. Sorry again for the delay.