Pegasus R6 freezes Mac Mini running Sierra 10.12.5

  • Last Post 26 June 2017
Alex Goldberg posted this 26 May 2017

This started happening sometime ago but now got to the point where it's absolutely unworkable. I'm running Mac OS Server 5.3.1 on Mac Mini with Sierra 10.12.5. I have installed the latest driver, firmware and utility software for this Pegasus R6. Nothing helps. If I have Pegasus connected to the Mini and restart teh computer it stays in a working condition for about 10 minutes and then Server stops working I can't open any applications on the Mini at all. If I disconnect the Thunderbolt cable from the Pegasus then the computer runs without any issues. As I said it started happening about a month ago. I used to have to restart the computer a coupe of times a day. But now I have to keep restaring it constantly. I need to have this file server working! I have over 100 people depending on it! I reinstalled Mac OS on the Mini already, and no more updates are available for the Pegasus.

Order By: Standard | Latest | Votes
Pradeep Chidambaranath posted this 26 May 2017

Hi Alex,

Kindly go to to register the product and create a support ticket with the latest subsystem report for further assistance.

Go to the below link go download the latest version of the utility.  

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.  


Go to the below link to access the KB link to get the step by step instruction on how to upload the files to the support case.  


Pradeep C.

Riot Nrrrd posted this 26 June 2017


I have a Pegasus(1) R6 12TB with a 2012 Mac mini running Yosemite 10.10.5 and it seems to be perfectly fine.

Is an OS downgrade an option?