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Open and edit your Mac files from the new window or access them direct from Windows Explorer or your favorite software. MacDrive has built a reputation on blazing quick read/write speeds and unparalleled data security. MacDrive 10 extends the lead with even faster access and more protection for your Mac disks and files.

What is SD?

SD describes devices that conform to SD standards for non-volatile memory cards. See the SD Association website for details.

Are there size limitations for the cards that can be inserted into the SD slot?

Yes. The SD card specification for a memory card is 32mm by 24mm by 2.1mm. You can also use thinner cards, such as MultiMediaCards (MMC). Avoid using cards that have a thickness greater than 2.1mm, as they might damage the SD card slot if you try to insert them.

Which SD card formats work in the SD card slot?

Cards that conform to the SD 1.x, 2.x, and 3.x standards should work. The SD card slot can use:

• Standard SD, 4MB to 2GB
• SDHC (Secure Digital High Capacity), 4GB to 32GB
• SDXC, 4GB to 2TB
• MMC (MultiMediaCards)
• UHS‑II, up to 2TB (iMac Pro only)

You can use a passive adapter like the one shown here to make MiniSD, MicroSD, and higher density formats like MiniSDHC and MicroSDHC conform to the width and thickness specifications listed above:

How fast can my Mac read or write to an SD card in the SD card slot?

Mac notebooks use the USB bus to communicate with the SD card slot. They have a maximum speed of up to 480Mbit/s. Mac desktops use the PCIe bus to communicate with the SD card slot. Desktops can transfer data at a faster rate.

Check the packaging that came with your SD media to determine the maximum transfer rate that your specific card uses.

To determine the maximum transfer speed of your Mac, you can use System Information. Choose Apple () menu > About This Mac and then click System Report.

If you use a Mac notebook:

1. Select Hardware, then select USB.
2. Select Internal Memory Card Reader and look for the Speed entry.

If you use a Mac desktop computer:

1. Select Hardware, then select Card Reader.
2. Look for the Link Speed entry. Computers that use the PCIe bus express their speed as GT/s.

Does the SD slot work with cards that exceed 32GB?

Yes. However, most media manufacturers preformat the media using common block-and-cluster sizes that don’t approach the theoretical limits of a given file system.

Most SD cards use the FAT32 file format, and preformatted FAT32 SD media is commonly available up to a capacity of 32GB. Media that exceeds 32GB usually uses the exFAT file system, while some smaller capacity cards use the FAT16 file format. Preformatted FAT16 media is generally available up to a capacity of 2GB.

If you use OS X Snow Leopard 10.6.5 or later, you can find out which file system you’re using:

1. Insert the media into the SD card slot.
2. Choose Apple menu > About This Mac.
3. Click System Report.
4. In the Hardware section, click Card Reader, and find the File System field.

Will the SD card slot work with SD cards that use the exFAT file system?

Yes. Any Mac that has an SD card slot and is running OS X 10.6.5 or later can use the exFAT file system.

exFAT is also supported in Boot Camp with Windows 7, 8.1, or 10 on any Mac made in 2011 or later with an SD card slot.

How do I insert media into the SD card slot?

When you insert the card, make sure that the metal contacts face down and point toward the computer. Don’t force media into the SD card slot, as this might cause damage.

How does my Mac use the media inserted into the SD card slot?

Your computer recognizes a card inserted into the SD card slot as a USB storage device. You can mount, read from, and write to the SD card just like you can with any other USB storage device.

I put the card in the slot, but it didn’t mount. What should I do?

Remove the card and insert it again. Sometimes the SD card won’t mount properly if you put it into the slot too slowly.

Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Hard drives of 256GB or more are recommended for the best experience. These resources also contain helpful information: • • * These Mac models were offered with 128GB hard drives as an option. Certificates for cac card reader. Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement.

When I try to write content to the card, I get a 'cannot be modified' message. How can I fix this?

You see this message when you try to edit data on an SD card that’s locked. You need to use the lock slider to unlock the card before you can edit the data.

To eject the card, drag the icon that represents the card to the Trash. After the icon disappears from the desktop, you can remove the card from the computer. Adjust the lock slider tab to unlock the card, then reinsert the card into the slot. See the manufacturer’s instructions for the location of the slider tab.

Can I use Disk Utility to reformat an SD card?

You can use Disk Utility to partition and format an SD device as FAT32 (using the MS-DOS FAT setting) or Mac OS Extended. The Mac OS Extended format can be used only on Macintosh systems. Non-Apple systems won’t recognize cards formatted to Mac OS Extended.

You might have to format a card that’s larger than 32GB with exFAT if you want to use it with a digital camera, GPS, or another device. When in doubt, format the card in the device that you intend to use it with.

Can I install macOS on an SD storage device and use it as a startup volume?

Use Disk Utility to change the default partition table to GUID. Then format the card to use the Mac OS Extended file format.

How do I remove a card from the SD card slot?

Before you remove the card, allow any data transfer to SD media to complete. To eject the card, drag the icon that represents the card to the Trash. After the icon disappears from your desktop, you can remove the card from the slot.

Don't remove a card while your Mac is sleeping, as this could lead to data loss. Always wake your computer and eject the SD card before removing it from your Mac.

Can I use Secure Digital Input Output (SDIO) cards?

Can I use macOS to see the specifications for the interface hardware and media inserted in the SD card slot?

You can get information about the interface hardware and the media that you inserted in the slot from the System Information:

1. Choose Apple menu > About This Mac.
2. Click System Report.
3. In the Hardware section of System Information, select USB.
4. In the list of USB devices, select Internal Memory Card Reader to access information about the interface hardware and the media inserted into the SD card slot.

Can I use the SD card slot while running Windows using Boot Camp?

The SD card slot works with Boot Camp in all supported versions of Windows. You’ll need to download and install the Windows Support Software to use the SD card slot with Windows.

Learn more about using Windows on a Mac.

Can I use an SDXC card on my Mac with Windows?

You can use an SDXC card in Windows 7, Windows 8, and Windows 10 with these Mac computers:

• MacBook Pro (Early 2011 and later)
  MacBook Pro models from 2016 and later don't have a built-in SD card slot. You can use a USB-C card reader, or a combination of a USB-C to USB Adapter and a USB card reader.
  
• MacBook Air (Mid 2011 and later)
• Mac mini (Mid 2011 and later)
  Mac mini (Mid 2010) doesn't support SDXC cards.
• iMac (Mid 2011 and later)
  iMac (Mid 2010) doesn't support SDXC cards.

Can I use an SD, SDHC, or SDXC card to install Windows on my Mac?

No. You can’t use SD, SDHC, or SDXC cards with Boot Camp to install Windows software on Mac computers.

Need to read Mac drives in Windows?

Unfortunately, it’s not a straightforward process; you can’t just connect the Mac drive and expect it to work. Here’s everything you need to know to get it working.

Why Can’t Windows Read Mac Drives?

Windows and macOS use different file systems. Windows uses the NTFS file system for its internal drives, whereas Apple replaced HFS+ with its successor—Apple File System (APFS)—in early 2017. Today, APFS is used on Macs, iPhones, iPads, and Apple TVs.

External hard disks and USB drives are generally formatted with the Windows FAT32 file system for maximum compatibility. Most devices, including Macs, can read and write from FAT32 devices. There’s even a way to make a Mac read an NTFS driveWrite To Your NTFS Drives Again in OS X El Capitan (For Free)Write To Your NTFS Drives Again in OS X El Capitan (For Free)Some of the most common methods of adding NTFS support broke with the recent release of El Capitan, but you can still write to your Windows drives with a bit of tinkering.Read More.

All new Macs will be formatted with APFS. Older Mac drives may still be formatted with the HFS+ file system. Windows can’t read either file system by default.

We’ll show you how to access your Mac-formatted APFS or HFS+ drive on Windows.

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How to Read APFS on Windows

Firstly, let’s look at how to read the newer Apple File System format on Windows. All these apps will allow you to read drives from any updated Apple device, not just Macs.

1. MacDrive

MacDrive has been one of the go-to apps for a long time. The first version was released way back in 1996. If you’re prepared to spend some money, you don’t need to look elsewhere.

The app works with APFS drives and HFS+ drives.

Unlike some of the options we’ll discuss later, MacDrive lets you read and write data to your Mac-formatted drive directly from Windows.

The app is focused around the freshly redesigned Disk Management Window. It acts as a hub for all the Mac drives connected to Windows.

You will also be able to see your APFS or HFS+ drive directly within File Explorer, allowing easy integration with the rest of the Windows operating system.

Foxit reader. The application is noticeably smaller than Adobe's Acrobat software, making it ideal for those of you who need a powerful program which doesn't rely heavily upon system resources. Its core function is compatible with PDF Standard 1.7. It allows you to create, view, and print PDFs.

Other useful features include the ability to create and partition Mac disks direct from your PC, a powerful disk repair feature, and robust security tools.

The standard version costs $49.99. There’s also a Pro version. It adds several extra features, including automatic file defragmentation, support for RAID setups, and a way to create Mac ISO files.

A five-day free trial is available.

Download:MacDrive ($49.99)

2. Paragon APFS for Windows

Paragon APFS for Windows is another paid app. It is the main competitor of MacDrive.

The app provides read and write access to APFS-formatted partitions, read and write access to compressed and cloned files, and read-only support for encrypted volumes.

It supports disk auto-mounting at start-up, but doesn’t have MacDrive’s partition tools.

MacDrive has one big advantage over Paragon’s app: HFS+ support. Paragon APFS for Windows only supports APFS-formatted drives. If you have some older Mac drives lying around that are still running HFS+, you would need to separately purchase Paragon HFS+ for Windows. MacDrive, therefore, is a more economical option.

One license—which costs $49.95—works on three Windows PCs.

Download:Paragon APFS for Windows ($49.95)

3. UFS Explorer Standard Access

Our third and final recommendation for reading APFS drives on Windows is UFS Explorer Standard Recovery. Once again, it’s a paid option. The app will cost you €21.95.

UFS Explorer Standard Recovery is the most versatile app on this list. It can read the two formats we care about—APFS and HFS+—as well as NTFS, FAT, FAT32, exFAT, SGI XFS, Linux JFS, Unix/BSD, UFS/UFS2, and VMware VMFS.

As such, this is the app you should choose if you find yourself hopping between lots of different operating systems during your day.

UFS Explorer Standard Recovery also comes with RAID support as standard. The app has a built-in RAID builder, so you can customize it for your array.

There is a free version of the app with no time limits, but it will only let you copy files smaller than 256KB in size.

Download: UFS Explorer Standard Access (€21.95)

How to Read HFS+ on Windows

If your Mac-formatted drive is still running HFS+, use one of these three methods instead.

1. Install Apple HFS+ Drivers

If you only need read access, you can install the Apple HFS+ drivers for Windows. Be sure to remove Paragon or MacDrive before proceeding.

Download the correct Windows driver package, then follow these steps:

1. Copy the ApplsHFS.sys and AppleMNT.sys files to C:WindowsSystem32drivers
2. Merge the Add_AppleHFS.reg file with your Windows registry.
3. Restart your system.

The video above also demonstrates the process.

After restarting, your Mac-formatted drive should show up under This PC. This method only gives you read access to the drive. If you would like to edit or delete files, try one of the alternative methods below.

2. HFSExplorer

HFSExplorer is completely free. You can use it to access Mac file systems from Windows without paying a dime. The developer hasn’t updated it since October 2015 due to the arrival of APFS, but it still works on older systems.

HFSExplorer requires Java. We generally recommend against having Java installed, but it’s necessary here unless you want to spend money. You also need to run the app as an Admin.

This tool is simple to use. Connect your Mac-formatted drive to your Windows system, open HFSExplorer, and click File > Load File System From Device. HFSExplorer can automatically locate any connected devices with HFS+ file systems and open them. You can then extract files from the HFSExplorer window to your Windows drive.

Note that HFSExplorer is read-only, so you can’t modify or delete files on your Mac drive. It also doesn’t integrate with Windows File Explorer—files are available in the HFSExplorer application and you must copy them elsewhere.

Download: HFSExplorer (Free)

3. Paragon HFS+ for Windows

Paragon HFS+ for Windows is a paid application, but it distinguishes itself with additional features.

Unlike HFSExplorer, Paragon HFS+ for Windows provides full read/write access to Mac drives and promises high performance. It even integrates HFS+ file systems with Windows Explorer or File Explorer on Windows. Any Windows program can read from or write to the Mac drive.

The app costs $19.95, but it also offers a 10-day free trial. If you just need to recover files from a drive, 10 days is plenty of time to install this file system driver, copy your files over, and uninstall it.

Paragon HFS+ doesn’t need Java to work.

Download: Paragon HFS+ for Windows ($19.95)

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Or Format the Mac Drive for Windows

If you have a Mac drive lying around and you no longer have a Mac, you’re not stuck with the Mac file system forever. After recovering the files from your drive with one of the tools above, you can then format the drive and convert it to a standard FAT32 partition that will work with most devices.

Formatting will erase all the files on your drive, so make sure you have backed up your files. To format the drive, just use the dialog that appears when you connect the drive to your computer.

Check out our guide to learn more about using FAT32How to Format a Large Hard Drive With FAT or FAT32How to Format a Large Hard Drive With FAT or FAT32The FAT and FAT32 formats support up to 16TB. Yet Windows sets a 32GB limit for formatting with FAT or FAT32. We'll show you how to format larger drives.Read More.

Explore more about: File System, Hard Drive, Mac Tips, USB Drive, Windows Tips.

1. Apple data is so special that you have to buy some 'app' to access them from Windows.
   Send them to dev/null

2. android mobile can also read the files using OTG micro usb port :)

3. Thank you so much for this. Just what I need.

   Sometime back, my Mac has been acting up, to the point where I can't use it anymore. I'm thinking of reformatting it or re-installing Mac OS X.

   On the other hand, my 1TB external hard drive was initially formatted to be read and written with Mac only. Now, I have a Win PC but no access to the files there. I will surely try this out.

   Again, thank you very much. Cheers!

4. The Java application worked fine for me. Lucky I had the VM installed..

5. I bought today a WD my passport 25E3 from Curry Pc world. I was talking with the guy about Windows and an upgrade to my HP with another HP. For some reason ha gave me an external drive for MAC! I didn't notice until it was too late like why the hell my laptop can't see the hard and no drivers found for it. I literally black out when I saw it. No exchange or ref for opened boxes. But God I found you! and after bashing my head a few time, as I m not an expert I have managed to format my hard and now I can seeee it! Thank you sooo much!

6. This didn't work. Gave me the blue screen of death. Not worth it.

7. Thanks soo much!

8. Very helpful!

9. Another free way to do it - Download Ubuntu Linux, burn to a DVD (or put on a flash memory), boot from that - you can run Ubuntu without installing it. Ubuntu will see the Mac device as well as your Windows devices, and you can easily copy files from one to the other.

   This method doesn't many ANY changes to your Windows software.
   --Gary

   • Thanks Gary. These are the answers I've been looking for a long time. And it's free. Bill

10. Some of these programs cant access files if they are in 'core storage'. If your Mac is running OSX Lion or something newer this may be the case.

11. Tip: You must run HFS Explorer as Administrator on Windows in order for it to function properly.

    • thanks mate this Works. coz im using a hackintosh Laptop :)

12. I cannot get HFS Explorer to find my HFS+ formatted drive - containing a Time Machine backup of my MAC - when i plug the external hard drive into my USB port on my HP laptop running Windows 10. In fact the laptop doesn't even see the drive at all when I plug it in.

    What could the problem be?

13. Can a 'seagate for mac' slim drive be formatted NTFS (not fat 32) and used with windows 10 for external backup drive? Thanks.

14. Don't install Paragon HFS+!!! This program is not working and you can't remove it from your computer!

    • I've distrusted Paragon's filesystem code for years. About a decade ago I bought their Windows driver for reading EXT3 (Linux) filesystems. It seemed to work OK for about a month, but then suddenly after writing a file under Windows, the entire EXT3 filesystem became unreadable! Creating robust filesystem drivers is hard. A bug that only occurs on one write in a billion but that clobbers some critical element in some data structure the filesystem depends on can end up with you LOSING ALL THE FILES in the filesystem! Given the high risk of data loss, extensive testing is necessary before a filesystem driver can be deemed trustworthy, and it doesn't look like Paragon's testing is up to the task.

15. Be very cautious installing Paragon HFS+ on Windows 10. I used it on 8 with no issues, but twice I have tried to install it on Win 10, and both times it's bricked my computer with an INACCESSIBLE_BOOT_DEVICE error..

    I found out you have to go into your BIOS and set your SATA mode to IDE, then boot into Windows Safe Mode, do a System Restore, back into the BIOS and set SATA mode back to AHCI, then you can boot normally.

    I didn't want to spring for MacDrive, but at least it works.

    • This exact thing happened to me as well. I am in the process of reinstalling 100s of GBs of programs right now.

16. Same issue reported by Terry, Paragon HFS+ trial is useless and doesn't do anything. The help is an equally useless small bit of text.

    Transmac won't let you read/write but it works okay. I find I have to close / open the program once in a while to continue working with a drive.

    MacDrive despite costing the most was the one that worked. I recommend this.

17. I needed to open some to open a DMG of an entire Apple DVD - no thanks to the waste of time MacDrive 'trial'.

    All I had to do was Extract the DMG using 7-zip. Done.

    To examine and edit Apple .pkgs or .mpkgs, I needed Transmac.
    Note that it will BURN a DMG to disc, but just the uncompressed version (now an ISO) since its a PC.

18. For step 4, formatting the drive to ExFat would be better than FAT32. FAT32 has a size limit of around 4GB, so you can't put any files over that on there. ExFat has unlimited size limits and can read/write from a Mac and PC.

    • But ExFat is legally-encumbered so that anyone who tries to write a Linux driver for it is subject to a nasty lawsuit from Microsoft. FAT32 is the only filesystem I know of that can be both read and written under all three major operating systems (Windows, OS-X, and Linux) as well as by various special purpose devices like digital cameras. It's unfortunate that FAT32 is an archaic design and has some serious limitations, but if your files are smaller than 4 GB and the partition containing your filesystem is under 2 TB, FAT32 provides portability between OS's that no other filesystem can.

19. For the record, The Paragon app won't let you run the free trial any more. I downloaded the app TWICE, restarted the computer both times, and nada..zero..zilch..bupkis..no funtioning app. What gives?? All I can access is the help menu, which ain't helpful at all! And like Pablo said earlier, Why offer a 'trial' version, if you won't let us TRY it?!?! Dumb!

    Dec 30, 2009  Add another SD card reader that isn't working. Only thing I am not sure about is if it is related to upgrading to Snow Leopard. It was working before the upgrade, but it may just be a. About the SD and SDXC card slot on your Mac Some Mac computers feature an SD (Secure Digital) or SDXC (Secure Digital Extended Capacity) card slot that lets your Mac read and write data to SD media, such as digital camera memory cards. Jul 04, 2017  The cards are recognized when using a USB adaptor, and also work fine in my wife's MBP SD card reader, so I know it's not the cards. System Profiler recognizes the internal card reader on my system. I've tried resetting the SMC and reformatting the cards but nothing has worked so far. Windows 10 sd card reader not working.

20. MacDrive no longer allows access to Mac drives during the evaluation period.. How we are supposed to evaluate it without actually evaluating it is beyond my little brain.

21. Is MacDrive the only option that allows formatting disks in HFS+ format (and is that identical to or is MacDrive able to format and partition Macintosh Journaled volumes?) ?

    My wife's iMac HD died, I replaced it with a Crucial M550 1TB SSD and now it's telling me the disk is bad. All I have to check to see if the drive is actually bad is a Windows 7 x64 machine as her Air sure won't help. After two supposed hard drive failures in 3 months I'm a bit suspicious of the SATA controller or cabling. The Crucial SSD firmware update LINUX disc that boots a Mac or PC to update firmware failed repeatedly on the Mac with an error 13, which according to Crucial is common and issued an RMA. After I pulled the drive, I decided to plug into my test PC and the firmware updated fine and the disk management utility sees 3 healthy partitions, but I can't read them without one of the products mentioned in this thread. It sounds like MacDrive is the one I need, but seek confirmation as I do intend to purchase the product that best suits.

22. Paragon did everything i needed it to do, read, edit and save , job done!

    With the trial version, happy to buy after trial experience.

23. Hmmm, HFS+ for Windows. After trialling the free version and finding it appeared to do what I wanted it to do and did it reasonably well and simply, I thought I'd do the right thing purchased a license.
    But the purchased licence won't load while the trial version is installed & I can't uninstall the trial version despite being the administrator and disabling the User Account Control. So far, after 2 weeks, I'm still waiting for a response to my request for help from Paragon and it seems I could be waiting a while.
    Apparently, irrespective of the fact I have purchased a license, because I didn't also purchase a 'support package' I've gone on a 'no guarantee' waiting list while those who purchased a support package get preferential treatment. (WTF! Doesn't Paragon understand any person who goes to the effort of purchasing a license expects sufficient technical support to at least get what was purchased working. But apparently not. Further it seems some customers are more important that others).
    So, my strong recommendation is, 'think 2 or 3 times about when you want the application to work before you purchase. If you don't need it for several weeks, then go ahead but if you want it to work now, or if you expect support for your purchased license, FORGET IT!!!

24. The problem with Microsoft proprietary disk formats like NTFS or EXFAT is that there are no repair tools for other platforms which can reliably detect & fix errors on the volume if it becomes corrupted. So if you dont want to buy a Windows machine just to maintain your portable drives, dont use Microsoft formats.

25. I am a Mac user, video editor. The Fat32 limit of 4 GB makes it unsuable for my needs.

    I once had to prepare files for a non-profit client using windows XP. I instructed them to use the update for ExFat and prepared an ExFat drive to mail them original high quality HD video files on. It all went well until I realized some characters are illegal in ExFat and that made for a lot of initial problems. Once I removed any character like: !@#$%^&*() all was well.

    Somebody should mention that when talking about ExFat. Does anyone have a good link to reference?

    Thanks

26. Always format hard disk as EXFAT in mac. Read/Write both in Mac and Windows :)

    • 'Always format hard disk as EXFAT in mac. Read/Write both in Mac and Windows :)'

      Always and never are too terms not often used in IT. There are several situations where a Mac drive should be formatted in HFS+, but if you don't that then there's no point in explaining it to you. You can look it up if you care.

    • Typos, sorry.

      Always and never are two terms not often used in IT. There are several situations where a Mac drive should be formatted in HFS+, but if you don't know that then there's no point in explaining it to you. You can look it up if you care to.

    • 4GB filesize limitation.

      Have not had success with HFS+. It randomly stops working, and I have to reinstall. Going to try MacDrive.

      • Wiz,

        Exfat does NOT have any limitation in file size.

        Fat 32 DOES have 4GB limitation.

        You are getting the two confused.

27. i had a mac but reverted to windows after my board died installed a software not quite sure i think it was paragon hfs works fine i didnt need to format i still use the drive in mac format

28. Palu, installing the filesystem drivers that come with bootcamp on a non Apple computer is possible, I did it a few months ago to get files off an old hard drive.

    It was read only, but that was good enough for what I wanted to do.

29. I have a imac with bootcamp, so my win partition reads mac drives correctly

    This article comes in handy, if i ever need to go back to a windows machine full time.

    Always had the idea you could install the bootcamp drivers on a non-apple branded pc, but doesnt look like its a possibility. Shake, would have been perfect :)