Catalina introduced a bug which causes the MagStor driver to fail the first time it is installed. Install the driver, restart when prompted, then install and restart a second time to solve this issue. We are working to remedy this problem and appreciate your patience.

This installer contains the universal driver version - ArcSAS-V2.0.7-20201016 (for macOS 11 or higher)

macOS High Sierra 10.14 introduces a new security feature that requires user approval before installing driver software. Go to your Mac System Preferences > Security & Privacy panel to allow the system extension so your driver will work properly.

For additional information on this update, please visit:

For MacOS 11+, Download the new driver

For Previous 'non ARM chip' Mac devices, use the old driver.