1. Uninstall the ATTO drivers using the Uninstall.command in the appropriate device folder in the ATTO folder in Applications.

2. Rebuild the kextcache by typing: sudo kextcache -i / in a terminal window.

3. Restart the Mac and install the driver allowing the drivers to load in security preferences if prompted.

4. Reboot the Mac when the driver installation has completed.

5. When the Mac has rebooted, verify the LUNs are seen in the ATTO Config Tool.