This page contains drivers for multiple revisions and operating systems. Please check to make sure you are downloading the correct driver.
Security Settings on Mac
As of macOS High Sierra 10.14, a new security feature was introduced 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 more details, please see: http://developer.apple.com/library/content/technotes/tn2459
You may also need reduce your security settings from the MAC recovery screen. Please see: https://support.apple.com/en-us/HT208198
Revision A and B
The drivers required depend upon the revision of your device. Revision B will have a serial number starting with B, this serial number can be found on the bottom of your drive. Revision A will have no revision number visible. Make sure to install the correct drivers for your revision.