Mar 20, 2020  I had my logic board replaced by an Apple authorized dealer. When I got my MacBook Pro back and logged into my Apple ID, there are now 2 MacBook Pro entries in my Apple ID with the same serial number. I can delete one but not the other. There are a number of logic boards that correspond to the A1466 model of the Apple MacBook Air 13', some of which I have listed below 1, but I have highlighted the one for the year that you specified: 820-3209-A 661-6632 1,8 GHz 2012. 820-3437-B 661-7476 1.3 GHz 2013. 820-3437-B 661-00062 (4GB) 1.4 GHz 2014.

MacBook Pro, Mac OS X (10.5.7), iMac 24', iPhone 3G.

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Mac Identification Q&As (Identify Different Macs)

Also see: Mac Identification (Main) iPod, iPhone & iPad Identification

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Where can I locate the Serial Number on my Mac? Are Serial Numbers unique? What are the limitations identifying a specific Mac using the Serial Number?

Mac Serial Numbers can be located under the 'About This Mac' section of Mac OS X and on the hardware itself as well as on some packaging and receipts, making the identifier quite versatile for identification and differentiation.

The easiest way to locate the Serial Number for a particular Mac is to select 'About This Mac' under the Apple Menu on your computer and click the 'More Info..' button.

You should see a window similar to this one:

Image Credit: EveryMac.com

In this example, from EveryMac.com's own collection, the underlined W8810X481AX Serial Number is enough to identify a single Mac and it is believed to be unique to this one particular model -- the MacBook 'Core 2 Duo' 2.4 13-Inch (Unibody).

Please note, however, that not all Macs of a particular model have the same Serial Number characteristics. Another reader also could have a MacBook 'Core 2 Duo' 2.4 13-Inch (Unibody), but it could have quite different identifying characteristics.

Additionally, and unfortunately, Serial Number identifiers are not always unique to one Mac either, and this is a limitation overall. Based on hands-on inspection and thousands of reader-submitted Serial Numbers there appear to be some different models in the PowerBook G4, Power Mac G4, Power Mac G5, Mac Pro, iMac and eMac lines that share identifying information. There very well may be models in other lines that share identifying information, too.

When Serial Number identifying information is shared they usually, but not always, are from the same subfamily. One still should verify that an exact match for a Serial Number is correct and comprehensive using secondary identifiers whenever possible. Should you encounter a potential error or an omission in EveryMac.com's Ultimate Mac Lookup, please report it. Thank you.

Another weakness of using Serial Numbers for identification is that repairs can alter or remove the serial number in software or hardware and/or provide conflicting Serial Number information. Occasionally, there are different Serial Numbers listed on the hardware and in software due to manufacturing error as well. In these situations, one will need to use alternate information to identify a particular Mac.

If a Mac will not boot, and/or locating a Serial Number is easier externally (perhaps the power cable is missing, damaged or in another location, for instance), this can help pinpoint where Serial Numbers are located on different Macs:

* MacBook and MacBook Pro models with batteries that are not designed to be removed by the end user and MacBook Air models have Serial Numbers etched on the bottom. MacBook and MacBook Pro models with removable batteries have the Serial Number inside the battery bay (either on the bottom of the bay or on the side walls).

Also see:

Download AVOX Evo 3.0 for Mac from our website for free. The application lies within Audio & Video Tools, more precisely General. The most popular version among AVOX Evo for Mac users is 3.0. The actual developer of this Mac application is Antares Audio Technologies. Trusted Windows (PC) download AVOX Evo 3.0.3. Virus-free and 100% clean download. Get AVOX Evo alternative downloads. You can download Avox 3 0.1 for Mac from our application library for free. This software for Mac OS X is a product of Antares Audio Technologies. The most popular version of the tool is 0.1. The program lies within Audio & Video Tools, more precisely General. This program was originally developed by Antares Audio Technologies. The software lies within Multimedia Tools, more precisely Editors & Converters. Also the tool is known as 'AVOX Evo VST'. Our antivirus analysis shows that this download is virus free. This PC software is developed for Windows XP/Vista/7/8/10 environment, 32-bit version.

• Where can I locate the Order Number for my Mac? Are Order Numbers unique? What are the limitations identifying a specific Mac using Order Numbers?
• Where can I locate the Model Number or Family Number on my Mac? Are they unique? What are the limitations identifying a specific Mac using this identifier?
• Where can I locate the EMC Number on my Mac? Are EMC Numbers unique? What are the limitations identifying a specific Mac using EMC Numbers?
• Where can I locate the Model Identifier (Model ID) or Machine Model for my Mac? Are Model Identifiers unique? What are the limitations identifying a specific Mac using the Model Identifier?

If EveryMac.com does not identify your Mac -- or it identifies a different Mac or Macs -- when you type in its Serial Number, but you are able to track down your Mac using another identifier, please share any missing information. The Ultimate Mac Lookup feature is quite comprehensive, but it will be even more so with your additions. Thank you.

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