SD Card Slot in New MacBook Pros Supports UHS-II With Speeds Up to 250 MB/s [Updated]

Apple has confirmed to The Verge's Dan Seifert that the SD card slot built into the new 14-inch and 16-inch MacBook Pro models supports UHS-II, and while this could theoretically allow for read and write speeds of up to 312MB/s with USH-II SD cards, Apple has since confirmed that the reader supports up to 250MB/s of data transfer.

macbook pro ports hdmi sd
Some people had hoped that the SD card slot would support UHS-III with read and write speeds up to 624 MB/s, but this is not the case.

Users can take advantage of the SD card slot for additional storage space, with UHS-II-compliant SD cards available in capacities such as 64GB, 128GB, and 256GB. The return of the SD card slot will be particularly useful for professional users like photographers and video producers, allowing them to quickly transfer files without needing to use an adapter.

The SD card slot is one of three ports that returned to the new MacBook Pro models after being removed in 2016, alongside an HDMI 2.0 port and MagSafe. The notebooks also have three Thunderbolt 4 ports and a 3.5mm headphone jack.

2021 macbook pro ports
In addition to the expanded connectivity, key features of the new MacBook Pro models include Apple's next-generation M1 Pro and M1 Max chips, mini-LED displays with ProMotion for up to a 120Hz refresh rate, up to 10 hours longer battery life per charge, full-size physical function keys instead of a Touch Bar, and more.

The new MacBook Pro models have been available to order since Monday and will begin arriving to customers and launch in stores on Tuesday, October 26. Pricing starts at $1,999 for the 14-inch model and at $2,499 for the 16-inch model.

Update: The SD card slot on the new MacBook Pros supports up to 250MB/s of data transfer with UHS-II SD cards and up to 90MB/s with UHS-I SD cards, according to information shared by Apple after this story was published.

Note: MacRumors is an affiliate partner with Amazon. When you click a link and make a purchase, we may receive a small payment, which helps us keep the site running.

Related Roundup: MacBook Pro
Buyer's Guide: MacBook Pro (Buy Now)
Related Forum: MacBook Pro

Popular Stories

ios 26 1 slide to stop

iOS 26.1 Brings Back 2007 Feature in New Way

Friday October 31, 2025 1:40 pm PDT by
The upcoming iOS 26.1 update includes a small but helpful change for iPhones, and it could prevent you from running late to something important. Specifically, when an alarm goes off in the Clock app, there is a new "slide to stop" control on the screen for turning off the alarm. On previous iOS 26 versions, there is simply a large "stop" button, which could be accidentally tapped. The new ...
Apple Logo Spotlight

Report: Apple to Launch These New Products in 2026

Sunday November 2, 2025 5:34 am PST by
Apple is planning to launch at least 15 new products in 2026, according to Bloomberg's Mark Gurman. Gurman outlined what to expect from Apple in 2026 in the latest edition of his "Power On" newsletter. He said the company is heading "into one of its most pivotal years in recent memory," with the rollout of major new Apple Intelligence features, intense regulatory pressure on the App Store,...
M5 MacBook Pro

Waiting for New Macs? Apple Just Shared Bad News

Friday October 31, 2025 7:32 am PDT by
Apple has just given a strong indication that it will not be releasing any additional new Macs for the remainder of the year. Apple's CFO Kevan Parekh dropped the hint during the company's earnings call on Thursday:On Mac, keep in mind, we expect to face a very difficult compare against the M4 MacBook Pro, Mac mini, and iMac launches in the year-ago quarter.Parekh essentially gave a heads up ...
Apple Foldable Thumb

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Friday October 31, 2025 8:52 am PDT by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Below, we've collated an updated set of key details that have been leaked about Apple's foldable iPhone so far. Ove...
Apple Intelligence General Feature 2

New Version of Siri to 'Lean' on Google Gemini

Sunday November 2, 2025 6:06 am PST by
In his "Power On" newsletter, Bloomberg's Mark Gurman today provided an update on the status of Apple Intelligence and the plans for it in 2026. Apple is still planning to roll out its revamped version of Siri around March of next year. The release should be accompanied by the release of a new smart home display product with speaker-base and wall-mount options. A new Apple TV and HomePod...
Coffee Burgundy and Purple iPhone 18 Pro Mock 1

Leaker Outlines Potential New Colors for iPhone 18 Pro

Friday October 31, 2025 8:28 am PDT by
Apple's iPhone 18 Pro models could be available in new rich and warm color option, according to a known leaker. The Weibo user known as "Instant Digital" today suggested that next-year's iPhone 18 Pro models will be available in at least one of the following color options: Coffee, purple, and burgundy. The iPhone XR, iPhone 11, iPhone 12, iPhone 14, and iPhone 14 Pro were all available in ...
HomePod mini and Apple TV

New Apple TV and HomePod Mini Likely Launching Soon

Sunday November 2, 2025 5:49 am PST by
A new Apple TV and HomePod mini could launch as soon as this month, Bloomberg's Mark Gurman today suggested. In today's "Power On" newsletter, Gurman said that Apple retail stores are planning an overnight refresh on the evening of November 11, where changes will be made after closing, such as refreshing displays and placing new products for the following day. The timing of the overnight...
iOS 26

iOS 26.1 Available Tomorrow With These 8 New Features

Sunday November 2, 2025 11:50 am PST by
Following more than a month of beta testing, Apple is expected to release iOS 26.1 this Monday, November 3. The update includes a handful of new features and changes, including the ability to adjust the look of Liquid Glass and more. Below, we outline key details about iOS 26.1. Liquid Glass Toggle iOS 26.1 lets you choose your preferred look for Liquid Glass. In the Settings app,...
iPhone 17 Pro Cosmic Orange

8 Reasons to Wait for Next Year's iPhone 18 Pro

Thursday October 30, 2025 4:42 am PDT by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...

Top Rated Comments

zorinlynx Avatar
53 months ago

Anybody planning to use a 1TB SD for Time Machine?
If you decide to do this, encrypt the backup, use two of them, and swap them occasionally. Keep the one you're not using in a different location.

Now you have offsite backups.
Score: 27 Votes (Like | Disagree)
Zdigital2015 Avatar
53 months ago

Still kinda outdated just as pros are moving over to CFExpress and with SDexpress coming up.

And the HDMI should have been an Input to record video from pro cameras.
SD Card is outdated or the read speed of this new slot is outdated? Again, single use ports are a waste of time, but people cried and whined and stomped their feet to get these ports back, and Apple caved, so basically I don’t want to hear anyone complaining anymore. They wanted them they got them, suck it up buttercups.

Please tell me which single HDMI port on what device allows both In and Out? I’ve never seen that before on any device that I own. I have several monitors with HDMI In/HDMI Out as separate ports. You’re basically asking for Apple to make an Atomos Ninja and give it away for free to customers, which isn’t going to happen.
Score: 18 Votes (Like | Disagree)
giggles Avatar
53 months ago
Anybody planning to use a 1TB SD for Time Machine?
Score: 16 Votes (Like | Disagree)
theluggage Avatar
53 months ago

But now we lost one TB3 port for a HDMI port that most will never use or at best use infrequently.
Ah, yes, the mythical "stolen TB3 port"...

Each TB/USB4 port on the new M1 machines now has its own, dedicated controller on the SoC, c.f. the old intel machines where each pair of ports shared the bandwidth of a single controller. So the M1 Pro/Max machines actually have 50% more Thunderbolt bandwidth than the old 4-port Intel MBPs, and the ports now support the new TB4 hubs, so each of those 3 ports can now run a hub with 4 TB4 ports that can be used for TB/USB or DisplayPort.

...according to Apple, the M1 Pro/Max chips have 3 Thunderbolt controllers. There's no evidence of a 4th TB controller that has been stolen by the restored ports. The SD slot just needs a USB 3.0, HDMI just needs a spare eDP 1.2 stream, and the MagSafe doesn't need any CPU resources whatsoever (maybe a USB 2or IIC or suchlike for control). An extra full function TB4 port needs a huge amount of resources in comparison.

Also: take an old 4-port Intel MBP, connect a charger, plug into a data projector or TV (a pretty common scenario) and count how many TB ports you have free for other things - 2. Now do the same with the new M1 Pro Macs - the charger goes into MagSafe, the TV goes into HDMI and you still have all 3 TB ports left. Yes - you could carry a multiport dongle, but now you don't need to - and if you are prepared to carry a hub around you can now use a TB4 hub that gives you 4 extra TB ports, a bunch of USB 3 and still leaves two of the original built-in TB ports free.

This is the problem with the whole USB-C concept: one port for all sounds cool, but it actually means funnelling several scarce but unrelated resources: PCIe/USB3, video streams and power input/output - through a single connector and creating an artificial bottleneck. Plug a charger in and you can't use that port for data or video, plug a display adapter in and you can't use it for video and data.

It would be fine if you could have 6-8 of those universal ports in those machine so there were plenty of holes to go around - but that's far more expensive and complex than adding dedicated ports for the most common requirements. Or it's fine if you are going to carry around multi-port hubs - but that's a disadvantage for an ultra-portable laptop.

The HDMI and SD slots aren't there for your super HDR 6k display or the CF super-express-plus-bingo camera body you're going to buy in 2 years' time - they're for boring but common scenarios, like when you want to want to plug into a data projector at a meeting or a hotel room TV, or offload photos from your camera or drone to free up space in a muddy field and it's really, really convenient not to need an adapter.

What the new MBPs have done is to give you fewer, higher bandwidth bandwidth "universal" ports that can be used with hubs, docks & daisy chains to efficiently drive multiple devices, plus a reasonable selection of single-use ports so you don't have to waste the universal ports on single use devices.

It's a pity they couldn't have stretched to HDMI 2.1 and/or squeezed in an extra USB-only port, but bandwidth doesn't grow on trees, and maybe they would have had to steal from TB (particularly for the HDMI 2.1).
Score: 14 Votes (Like | Disagree)
SuprUsrStan Avatar
53 months ago
Was hoping for UHS-III but I can settle for just UHS-II. Theres not that many UHS-III cameras out there yet. At least its not a case of outdated spec like the HDMI port.
Score: 13 Votes (Like | Disagree)
TheSynchronizer Avatar
53 months ago

Apple's Pro Machine finally has the quantity and range of ports that the Air should have! The pro devices should have a ethernet port as well. It looks as though the height of the base of the laptop is perfect for it. Lots of valid 'pro' use cases that need the reliability of ethernet. Pretty much any industrial process can't (or shouldn't) be run over WiFi. So nearly perfect.
I feel like ethernet ports on laptops in 2021 is such a niche requirement that you may aswell just buy an ethernet to usb-c adapter and leave it attached to your ethernet cable
Score: 12 Votes (Like | Disagree)