Hangs up and restarts on Late 2013 Imac using catalina 10.15.7 (unsupported)

I ran EtreCheck. Problem description is included in report.EtreCheckPro version: 6.8.9 (68074)

Report generated: 2025-03-23 11:36:08

Download EtreCheckPro from https://etrecheck.com

Runtime: 3:24

Performance: Excellent

Problem: Computer is restarting

Description:

Running macOS Catalina 10.15.7 on iMac 27” late 2013. I can not upgrad

e to newer OS because my Mac is now unsupported. I did a fresh instal

of Catalina and the beachballing got worse and now shuts down. I have

been trying to use disc utility first to correct this but doesn’t seem

to work.

Major Issues:

    Anything that appears on this list needs immediate attention.

    Unsigned files - There are unsigned software files installed that could be malicious and should be reviewed.

    Kernel panics - This system has experienced kernel panics. This could be a sign of hardware failure.

    Obsolete hardware - This computer may be considered obsolete.

Minor Issues:

    These issues do not need immediate attention but they may indicate future problems or opportunities for improvement.

    Heavy RAM usage - Apps are using a large amount of RAM.

    Apps crashing - There have been numerous app crashes.

    Clean up - There are orphan files that could be removed.

    System modifications - There are a large number of system modifications running in the background.

    Limited permissions - More information may be available with Full Disk Access.

    Kernel extensions present - This computer has kernel extensions that may not work in the future.