Apple Plans to Switch to Randomized Serial Numbers for Future Products Starting in 2021 [Updated]

In an internal memo shared with Apple Authorized Service Providers, Apple has indicated that it plans to update its serial number format to a randomized alphanumeric string for future products starting in late 2020 (update: Apple now says 2021). Apple says all serial numbers that exist before the change is made will remain the same.

macos catalina serial number
Apple already uses alphanumeric serial numbers, but it has long been possible to determine the date and location that a product was manufactured based on the current format. Readers would often use serial numbers to glean more information about their devices. The randomized format would likely not be decipherable, or at least hard to, and it could also help to reduce fraud.

The memo was published today and obtained by MacRumors from a reliable source. It is unclear if the change will apply worldwide.

Update: Apple has delayed this change until some point in 2021, according to an internal document viewed by MacRumors.

Popular Stories

apple store down feature

Here's Why the Apple Store is Going Down

Thursday November 27, 2025 1:01 pm PST by
Apple's online store is going down for a few hours on a rolling country-by-country basis right now, but do not get your hopes up for new products. Apple takes its online store down for a few hours ahead of Black Friday every year to tease/prepare for its annual gift card offer with the purchase of select products. The store already went down and came back online in Australia and New Zealand, ...
Apple Foldable Thumb

Foldable iPhone to Debut These Three Breakthrough Features

Tuesday November 25, 2025 7:09 am PST by
Apple's first foldable iPhone is expected to launch alongside the iPhone 18 Pro models in fall 2026, and it's shaping up to include three standout features that could set it apart from the competition. The book-style foldable will reportedly feature an industry-first 24-megapixel under-display camera built into the inner display, according to a recent JP Morgan equity research report. That...
iPhone Pocket Short

iPhone Pocket is Now Completely Sold Out Worldwide

Tuesday November 25, 2025 7:16 am PST by
Apple recently teamed up with Japanese fashion brand ISSEY MIYAKE to create the iPhone Pocket, a limited-edition knitted accessory designed to carry an iPhone. However, it is now completely sold out in all countries where it was released. iPhone Pocket became available to order on Apple's online store starting Friday, November 14, in the United States, France, China, Italy, Japan, Singapore, ...
streaming black friday 2025

Black Friday Streaming Deals Include Big Savings on Disney+, Hulu, Apple TV, and More

Monday November 24, 2025 8:03 am PST by
We've been focusing on deals on physical products over the past few weeks, but Black Friday is also a great time of year to purchase a streaming membership. Some of the biggest services have great discounts for new and select returning members this week, including Disney+, Hulu, Paramount+, Peacock, and more. Note: MacRumors is an affiliate partner with some of these vendors. When you click a...
streaming black friday 2025

Best Black Friday Streaming Deals - Save Big on Apple TV, Disney+, Hulu, and More

Thursday November 27, 2025 1:14 pm PST by
We've been focusing on deals on physical products over the past few weeks, but Black Friday is also a great time of year to purchase a streaming membership. Some of the biggest services have great discounts for new and select returning members this week, including Apple TV, Disney+, Hulu, Paramount+, Peacock, and more. Note: MacRumors is an affiliate partner with some of these vendors. When...
General Black Friday Deals 25 Red Green

The 30+ Best Black Friday Apple Deals on AirPods, iPads, MacBooks, and More

Thursday November 27, 2025 6:46 am PST by
Black Friday is in full swing, and as always this is the best time of the year to shop for great deals, including popular Apple products like AirPods, iPad, Apple Watch, and more. In this article, the majority of the discounts will be found on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment,...
General Apps Messages Redux

Singapore Orders Changes to iMessage by December

Tuesday November 25, 2025 6:39 am PST by
Singapore has ordered Apple to block or filter messages on iMessage that impersonate government agencies, requiring the company to implement new anti-spoofing protections by December as part of efforts to curb rising online scams, the Straits Times reports. Singapore's Ministry of Home Affairs (MHA) said that it had issued an Implementation Directive to Apple under the Online Criminal Harms...
iphone air camera

iPhone Air Flop Sparks Industry Retreat From Ultra-Thin Phones

Thursday November 27, 2025 3:14 am PST by
Apple's disappointing iPhone Air sales are causing major Chinese mobile vendors to scrap or freeze their own ultra-thin phone projects, according to reports coming out of Asia. Since the ‌iPhone Air‌ launched in September, there have been reports of poor sales and manufacturing cuts, while Apple's supply chain has scaled back shipments and production. Apple supplier Foxconn has...

Top Rated Comments

lunarworks Avatar
77 months ago
Then technically it's not a serial number anymore. Serial numbers are in series.

But whatever. It's irrelevant to the concept.
Score: 28 Votes (Like | Disagree)
madmin Avatar
77 months ago
Please emojify my serial number !!

/s
Score: 22 Votes (Like | Disagree)
BBCWatcher Avatar
77 months ago
I like this idea overall, but Apple really ought to include some sort of check digit ('https://en.wikipedia.org/wiki/Check_digit') mechanism, and publish the formula they picked, so that it's possible to determine with high confidence whether a supplied Apple serial number could actually really be a genuine Apple serial number. (Only Apple would know for sure, of course.) There are all sorts of real world scenarios when businesses, governments, and other organizations need to take accurate inventories and when somebody transposes a digit or otherwise gets the serial number wrong. It'd be darn helpful if all these organizations could know, right away, when they've collected a serial number in their inventory taking that cannot possibly be a genuine Apple serial number.

Also, Apple ought to eliminate all characters from serial numbers that can be easily mistaken for other characters. This generally includes (as examples):

0, O, D, and (probably) Q
5 and S
1, 7, and I
8 and B
U and V

The choice of typeface can matter a lot here -- for example, to distinguish A from R -- but some easy-to-confuse characters ought to be dropped no matter what the typeface. This'll help even Apple's own support teams over the phone, etc., as they deal with consumers. There are still plenty of characters available to allow plenty of serial numbers for billions of products.

Finally (and now that Jony Ive has left!), don't be afraid to make serial numbers easier to read (in larger type) on devices. Apple has got typographic experts, so spend some effort making serial numbers easier to read within whatever (sometimes lame) aesthetic goals Apple is trying to achieve. IBM ThinkPads were pretty damn stylish, and they had big, easy to read serial numbers in easy to inventory places.
Score: 17 Votes (Like | Disagree)
tennisproha Avatar
77 months ago
This would be a switch for the worse. Serial numbers are the only remaining useful tool in determining more info about a product, like chip type used, place or date of manufacture, etc. This makes it harder for consumers to get product information Apple hides.

I have yet to find examples of serial number being used for outright fraud.
Score: 16 Votes (Like | Disagree)
Baymowe335 Avatar
77 months ago
Anything to reduce fraud is appreciated.
Score: 13 Votes (Like | Disagree)
guzhogi Avatar
77 months ago
I also wish they'd make the serial numbers bigger and easier to read. I work in IT, and it's a real pain to read the serial numbers off the bottom. Before anyone asks, checking About My Mac / Settings → General → About isn't possible if the device doesn't even start up. Maybe add a barcode version of it so I can use a barcode scanner.
Score: 11 Votes (Like | Disagree)