Solved! NTFS hard drive won’t mount on macOS 10.15.7 after security update – The Durango Herald

CHENGDU, China, March 25, 2022 (SEND2PRESS NEWSWIRE) — iBoysoft (, a professional and innovative software developer, upgrades one of its flagship products – iBoysoft NTFS for Mac – to the 4.2 as the first solution worldwide to the issue that NTFS-formatted external storage devices will not mount after the latest security update 2022-003 on macOS Catalina 10.15.7 on March 16, 2022.

There are many scattered reports that Microsoft NTFS external hard drive will not mount on macOS Catalina after macOS security updates. This issue seems to be recurring as it occurred in 2021 after security update 2021-003, and NTFS drives fail to mount again on macOS 10.15.7 after new security update 2022 -003, even with a third-party NTFS driver for Mac installed.

Users try to uninstall and reinstall NTFS driver, but NTFS external hard drive still not working. Returning error “ Error 49221” occurs when users mount NTFS drive manually in Disk Utility. Obviously, the security update created a problem in drive management. iBoysoft immediately updates its NTFS for Mac software to specifically deal with NTFS external hard drive not mounting on macOS 10.15.7 after security update.

iBoysoft NTFS for Mac helps to automatically mount Windows NTFS drives in read and write mode once the storage devices are recognized by Mac. Then users can open NTFS drives as they did before the security update. All NTFS are fully adapted for macOS and become editable.

This powerful NTFS for Mac from iBoysoft continues to offer fast and secure NTFS support with its stable self-developed file system driver. Along with NTFS mounting capability, this utility comes with basic disk management features such as opening, ejecting, repairing, formatting NTFS formatted hard drives, SSD drives, USB drives , memory cards, etc.

More information:

Price and availability

iBoysoft NTFS for Mac v4.2 is ready for macOS 12/11/, 10.15/10.14/10.13 and supports Intel Macs and Apple Silicon Macs. The installer for macOS 10.12 or earlier is available via email support. It costs $19.95 per license for an annual subscription. Learn more:


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Steven L. Nielsen