Could you please install the latest Pegasus drivers for MAC to see how it works. Go to the below link to download the drivers.
If the problem persists, kindly go to https://support.promise.com and register the product and create a new support ticket with the latest subsystem report for further investigation.
Follow the below step to save the subsystem report for further investigation.
- Open Promise Utility.
- Click subsystem information icon on the top of the window.
- Click the lock symbol on the left bottom corner of the screen to unlock the utility.
- Click on save service report button to save the subsystem report.