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OS Monterey 12.0.1 - SanDisks Have Stopped Working

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.


What's up?

Posted on Oct 31, 2021 8:41 AM

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Question marked as Apple recommended

Can you try the drives on another computer?

I would contact SanDisk, maybe an updated app is required for Monterey.

Posted on Oct 31, 2021 9:10 AM

46 replies

Dec 13, 2021 6:33 AM in response to Derek365

Take a stick that you don't really care if you lose everything. Go to Apple disk Utilities and clear everything! Erase it.

Then go back to SanDisk and install "PRIVATE ACCESS" you will see two files with the same name. Then create a folder on the one that works. One will have a row of folders. Then use the one and place a new folder in it. Call it " My Files"> Or whatever you want. Then drag something in it. Close and then reboot - Then add your password and you should be good to go.

Dec 16, 2021 6:27 AM in response to Jamesd Demayo

This issue affects 4 tb disks only and only if I try to reformat and or use as a time machine. Disk worked fine as is for plug and file storage out of the box . 1 and 2 tb drives previously formatted disks for time machine work fine after latest os upgrade. (These are older, slower versions). I called sandisk tech support. They informed me that apple is aware and fix is coming with next os update. Work around suggested by them to reformat 4tb on prior version os worked for reformating, but did not work time machine for me. Had to return it.

Question marked as Helpful

Dec 23, 2021 12:53 AM in response to Rmannyb

My Sandisk flash-drive was also not being recognised. I went on the Sandisk website: the 'Secure Access' app no longer works with Monterey, the suggested fix was to download the 'Private Access' app (Mac and PC versions available). I have done this and now have access to my flash-drive as normal. The link to the download page: https://kb.sandisk.com/app/answers/detail/a_id/21996/~/privateaccess-support-information-and-download-page

Hope this helps.

Feb 14, 2022 12:01 PM in response to SimonB64

FYI; The instructions tell you to download and install it on the HD, this is not correct, it must me installed on the Flash Drive. Download the package, copy it to the Flash Drive then run the install selecting the Flash Drive as the install location.


I did this and all my files were there and the device works as it did prior to the OS Update.

OS Monterey 12.0.1 - SanDisks Have Stopped Working

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