TL;DR - Pegasus1 R6 latest firmware with macOS 15.2 via OCLP on 2011 Mac Mini is not seen by the Utility.
A bit of an odd one perhaps. Background - I had a Pegasus R6 gen1 connected to a 2011 Mac MIni Server running macOS X 10.5 for a lot of years and it was just about out of space. I had a 2012 Mac Mini that was no longer being used - so I did some upgrades on it and bought a used Pegauss R6 gen1 with double the size drives (and had to update its firmware). The highest supported macOS I could get that Mini to run is 10.15.7.
On to the 2011 I used Open Core Legacy Patcher to upgrade to macOS 15.2 - and I got the Pegasus to mount by applying some updates. However, I cannot get any verison of the Utiltiy to see the array. I have tried versions from 4.0.something all the way through 24.5.7 and the newer Utility versions just don't see it - and the old ones lock up and have to be forced off.
I was able to get it recognized by the Utility 24.5.7 while running macOS 12.7.4 after running the driver 6.2.17-3.
The computer runs well enough on 15.2 that I'd prefer to do that - but if my only option is to run an older OS in order to use all the functionality of my Pegasus1 R6 - then I will ahve to do that.
I do have two internal drives in that system - so I may also try macOS 13 and 14 to see what the higest level macOS I can get to cooperate.
It seems odd that the newest softwre runs and can see the array on the older OS - but not the newer one. So I am not sure if the ocmbinaton of OS and Utility and Driver are the issue - or if the use of Open Core Legacy Patcher is part of the issue.