New updates are being added at the bottom of this story…….

Original story (published on November 19, 2021) follows:

MacOS 12 Monterey is the latest iteration of Apple’s Mac operating system that was announced at WWDC in June and was officially released on October 25.

Ever since Apple introduced macOS Monterey, users have been facing several kinds of issues with this latest OS. The company has acknowledged and fixed some bugs, while many are still left unacknowledged.


There’s another issue that just recently popped up for some users on macOS Monterey which is making it difficult for them to use SanDisk external drives.

SanDisk SecureAccess app not working on macOS Monterey

Some users are complaining (1, 2, 3) that their SanDisk drives are not working on macOS Monterey when they try to access them via SanDisk’s SecureAccess application.

Users say that after they updated to macOS Monterey 12.0.1, the SanDiskSecureAccessV3_mac application isn’t recognizing any external drives and throws an error that says ‘This application only runs on a SanDisk flash drive’.

Here are some reports for reference:


Since upgrading my MacBook Pro to OS 12.0.1 Monterey my SanDisk USB drives aren’t working. When I try to access using the installed SanDiskSecureAccessV3_mac application I get “This application only runs on a SanDisk flash drive.” I’ve reinstalled app and nothing changes. Can’t access. All of the drives worked fine before the upgrade. (Source)

Formatting gets stuck at “Creating partition table”. Tried 2 different 4TB Extreme Portable V2 drives, same problem. Works fine on Big Sur. Contacted Apple and they said Sandisk needs to fix their firmware. Tried contacting SanDisk support but got frustrated with how bad it was and gave up pursuing the problem with them. (Source)

As a result, users are unable to format their SanDisk external hard drives or access their stored data.

Here’s how the error message is displayed in the app:


Apple allegedly said that this error has nothing to do with macOS Monterey and it’s a SanDisk issue to fix. Meanwhile, SanDisk stated that the application is not yet certified to be used on macOS Monterey.

No resolution. Apple blamed Sandisk, Sandisk just said the drive wasn’t yet certified for use on Monterey. I returned the drive & will probably stick with Samsung in the future (their drives seem to work fine on Monterey). (Source)

It seems that SecureAccess app isn’t fully optimized with Apple’s latest OS and SanDisk will need to update the application to make it work on macOS Monterey.

As a temporary workaround, users can downgrade to the previous macOS version to access their data or else, wait for SanDisk to fix this issue.

We hope that the company updates SecureAccess app with support for macOS Monterey soon. And when they do, we will update this section to reflect the same.

In the meantime, you can check out our dedicated macOS 12 Monterey bug tracker to see which bugs are affecting users.

Update 1 (November 20)

05:26 pm (IST): Users who are facing formatting issues can check out the workaround shared by an individual on the SanDisk community:

You can use a USB 2.0 usb c to usb c cable.
For example the USB charging cable that came with Macbook Pro prior to M1 magsafe cable.
Use that USB 2.0 speed C to C cable connect your Sandisk portable SSD to the Monterey Macbook pro and erase the partition to APFS. It will work.
After the erase process complete, you can switch back to use those fast 10Gbps USB C to C cable to connect the SSD and it will read/write normally and at full speed. (Source)

Note: We have more such stories in our dedicated Apple section, so make sure to follow them as well.

PiunikaWeb started as purely an investigative tech journalism website with main focus on ‘breaking’ or ‘exclusive’ news. In no time, our stories got picked up by the likes of Forbes, Foxnews, Gizmodo, TechCrunch, Engadget, The Verge, Macrumors, and many others. Want to know more about us? Head here.

Aashish Singh
502 Posts

I developed a keen interest in technology ever since my school days. And writing about it keeps me closer to this fascinating world. When I’m not working you can catch me playing video games.

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