Kernel Panics 2019 iMac Pro with Pegaus R4i

1) I can't see the Panic log in the link that you posted.

2) Panic logs generally only reveal clues and not the cause.

3) Kernel Panics can come from hardware and/or bad software.

The fastest and easiest way to track down hardware and software issues, is using EtreCheckPro.

Download and run the free version of EtreCheckPro, from > https://etrecheck.com/en/index.html

Then post the Report, as per > How to use the Add Text Feature When Post… - Apple Community

MCNCitizenship wrote:

Can anyone assist with deciphering the attached crash log? (File was too large so I added a link to it.) Panic Log

You can attach the log by using the "Additional Text" icon which looks like a piece of paper on the forum editing toolbar. It is always best to utilize the forum's tools so that the uploaded items remain accessible years later so that others may be better able to understand & learn from the thread.

Plus when posting Kernel Panic logs, it is best to post several if they are available so that we can see if there is any pattern to them. The EtreCheck report will show summaries of the Kernel Panic logs (sometimes it contains enough information, other times it doesn't include any relevant information since these logs can take a lot of different forms).

In most recent MacOS versions, the previously built-in Drivers for Promise devices (also invoked and used by several other devices) were deprecated because they violated to increasingly grueling standards for MacOS extensions. The built-in extensions are now a very old version.

Readers have been forced to side-load different versions of additional extensions to get their Promise devices to operate.

Be sure to check with Promise and obtain the absolute most up-to-date Drivers, and any additional device they may offer.

Do you have a Mac Pro,

or an iMac Pro:

Can you confirm before we go farther? When I looked up the Pegasus, it appears be incompatible with the iMac Pro, that has soldered, not slotted gfx hardware.