Imac 14,1 on OCLP Sonoma constantly freezing and beach balling

Hi,

I upgraded my Imac 14,1 with a new ssd. I removed the HDD and added a new 2 TB SSD. I didn't remove the already present, small ssd from the Fusion Drive - but I hope, this doesn't matter. The machine has its 8GB RAM - I didn't upgrade it to 16GB (yet).

I installed Sonoma with OCLP and restored my TimeMachine backup. The iMac is up and running and everything looks as expected.

After working a while with this machine, I started to discover first issues. On a very irregular schedule the OS starts freezing or misbehaving like:

• Apps crashing
• downloads freezing
• Beachball appears
• OS freezes to a level, that I have to hold the Power button to reboot

It feels a bit like having a bad RAM. I tried to verify my RAM with 3rd party tools like memtest. I let it run for a long time and a lot of cycles and I got always the information that the RAM is working properly and does what it should.

I started the machine in safe mode and there the system runs without freezes and beach balls (but because of the safe mode - a bit slower).

I have no clue how to debug this issues further because I don't know where to start. I did already the following things:

• Opened Activites and checked, if there is something unknown / high CPU consuming running:
  • Last test was that I tried to update OCLP to 1.5.0. Starting the download raises cpu load to 100% (i guess on one core because idle is about 50%). But as i reached something about 50% of the download, the freezes began. I hat lags of about 60sec. I couldn't even move the mouse. After the freeze, I was able to resume normal for about 10sec. Then the cycle began again and it freezes. If I close the OCLP App, the freezes continue and the CPU Load is now down to 3% (inactive 97%)
• Checked Ram with htop: about 5GB used - no swap

Installed Software:

• Nothing very uncommon.
  • Microsoft Office 365
  • Chrome
  • couple of small cli tools via homebrew

Does anybody of you have an idea, how to proceed here? Is there a tool to check for issues or can I provide more information for any further help?

Thank you for your support

--dp