MP 1,1-5,1 Mojave crashes every 5-6 days

[IOPS5]

I am running Mojave on an early 2008 Mac Pro 3,1. I've installed using dosdude1 guide and the Mac works flawlessly for about 6 days. The computer will hang while I'm using it -- menus and keyboard input are corrupted and running programs will crash. Rebooting, the gray bar will grow as the various subsystems start, but the video does not start and the bar will reach the right side with the boot process stopping. Booting in verbose mode doesn't indicate any problems. If i reinstall the operating system (with patches) taking about 45 minutes, the system comes back exactly where I was when it hung (same windows and programs), except for a different hostname and the need to reinstall Java. It looks like some system libraries are getting corrupted, but I haven't be able to figure which ones and by what process. Any debugging suggestions are much appreciated.

 

[KeesMacPro]

You could test a clean install (not a reinstall/recovery) on a different (known working) drive to figure out if it's hardware or software related.

 

[Macschrauber]

and try the box with El Capitan to ensure the machine is well.

I run Mojave on a 3.1 and my box is rock stable.

Check the LEDs by the ram risers, too. Memory is getting picky when getting old.

 

[IOPS5]

and try the box with El Capitan to ensure the machine is well.

I run Mojave on a 3.1 and my box is rock stable.

Check the LEDs by the ram risers, too. Memory is getting picky when getting old.

I also run El Capitan (I have it on a second drive) and it has the same problem. I've replaced or removed memory, but no warning lights on the memory, except OK on boot. Diagnostic LED are unlit or green, except for standby which is yellow as it should be.

 

[IOPS5]

You could test a clean install (not a reinstall/recovery) on a different (known working) drive to figure out if it's hardware or software related.

I have El Capitan on a second drive. A prior configuration had Mojave on a mirrored RAID using two identical SSD drives, but the same problem. I think this indicates it is not a hard drive or controller problem. The video card is from another mac pro 3,1 running high sierra and it did not have the problem.