How does Dropbox uniquely identify a computer?

What is the "Unique Device Identifier" (UDID) of a non-iOS device such as a Macbook Pro on Mac OS X?

I wanted to know if the hardware serial number associated with a Macbook Pro is itself being treated as a UDID, or is there something else that uniquely identifies the device?

I'll be a little context provide which is not completely required, but for those can be useful want to understand my motivations behind the question, otherwise skip to the last paragraph.

It's been 21 days since my Macbook Pro was stolen with Mountain Lion [Mid 2010]. Although there are several software based tracking / geo-locating errors installed on my hard drive, it was not found when I found my Mac or some other service that would have sent me an IP if my device had accessed the internet [assuming , This was not the case]. not wiped]. That leaves only two options: either my Macbook has never [inexplicably] been used to access the Internet since it was stolen, or it was used to access the Internet after my hard drive was erased. Since I didn't have firmware based tracking that would report back to me, it seems clear that it is no longer inevitable that in the future I will get some information from my device communicating with me directly.

In the worst case, my hard drive was either erased or completely replaced with a new one. There is some type of information that I am currently aware of that is definitely still being submitted to Apple's servers when connected to the internet. Help service or other Apple system modules send anonymous information to, etc. This anonymous information likely includes the device's hardware serial number, as well as other details such as the operating system version, etc. Can't I be assuming this incorrectly? Is this hardware serial number unique or unchangeable? I remember all of my chipsets have been replaced and still have the same serial number. Where exactly is this series? Would disassembling the Mac keep the hardware serial? Or is there anything else that Apple devices communicate with their servers to identify themselves?

I am wondering if UDID is logged in this way, is then somewhere in a database and I just need to contact the authorities concerned (law enforcement agencies, etc.) to get this non-personal data and determine if my hardware is still there or if it was sold as scrap metal.

Thanks in advance. Stackexchange is the last place on the internet I still believe in! I look forward to learning more. :) :)

Macbook Pro Mid 2010 OS X 10.8.2 Original charger not stolen - [Apple computers are also extremely rare, so it would be difficult to find a charger] Last IP connection from my computer for Dropbox sync.

Addendum:Some additional information - I'm not in or out of the western world, so non-tech advice on theft prevention would probably not explain the dystopia I am embroiled in. Also a gentle reminder not to make this a forum to highlight / promote good security practice / appropriate pre-planning or post-theft response. These stock answers and responses are available elsewhere, and I would hate to get advice / help outside of the topic. Please do not accept anything that I have not specifically mentioned. For example, don't blame the victim, don't assume I'm not making a backup, etc.

Oh, I didn't perform a firmware lock because I didn't want the thief to break my hardware and throw it away.

Bottom up!

Gustaf R.

Go to > About This Computer> System Report ...> And there you will find the Hardware UUID


This can also be called up via a terminal command: "system_profiler -detailLevel full SPHardwareDataType", which not only shows the UDID / UUID, but also other hardware-specific information.


The Mac equivalent of a UDID is a serial number. You can find it by clicking on "About This Mac" in the  menu and double-clicking on the version number.