Panic cpu 0 security violation errors

I think your wounds are self-inflicted.

Security:

    Gatekeeper: App Store and identified developers

    System Integrity Protection: Enabled

    Antivirus software: Apple and Symantec

By far the easiest way to cause poor performance, instability, overheating and crashing is to install ANY third-party speeder-uppers, Cleaners, Optimizers, or Virus scanners. or a VPN that you installed yourself. The main reason is that they are relentless in scanning your files, non-stop, looking for things virus-like patterns in Everything. When completed, they do it all again.

The idea that a third party, with no special knowledge of the inner workings of MacOS, can somehow find a simple way to protect your computer — that is not already being done by MacOS itself — suggests that the MacOS developers are somehow "holding out on you". That is absurd.

You should remove any and all (other than Apple built-in) virus scanners, speeder uppers, optimizers, cleaners, App deleters or VPN packages you installed yourself, or anything of that ilk.

Third-party file Sync-ers such as DropBox, BackBlaze, OneDrive, or GoogleDrive can ruin performance, but are not inherently dangerous.

Effective defenses against malware and ot… - Apple Community

DART is Memory Management Unit.

¿Is this a Mac Studio Ultra? it seems to indicate 8110 DART:

panic[...): t8110dart [...] (dart-apciec3) SECURITY VIOLATION: instance 0 (TZ_SELECT) changed

expected 0x00000000

actual 0x00000001 @t8110dart.c:2342

... and the change is a One-bit change, widening the possibility of a flipped bit in memory

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consider downloading and running this little "discovery" utility, Etrecheck. it changes NOTHING.

it contains little tests for speeds of devices, CPU utilization, memory usage, energy usage and a digest of recent problems, in one easy to use package. it does not even need to be Installed.

if you follow the directions faithfully, its report (pre-laundered of all personally-identifiable information) can be "Shared" to the system ClipBoard, the Pasted into an Additional text window in a reply on the forums.

Use Etrecheck Pro for free

Etrecheck is an exceptionally good tool for debugging. It was invented by a senior contributor on the forums, to fill a gap that used to require 20 different and back-and forth questions just to get a tiny fraction of its huge visibility into what your Mac is doing inside.

I read and interpret one or two Etrecheck reports that users have submitted most days. There are other readers who are even better at finding details in then than I am. As is common here on the Apple User-to-User Support Community, MANY eyes find things that one pair of eyes may not.

.

MacOS shares a lot of the lock-down mechanisms developed for the iPhone. Applications are all sand-boxed with a list of the resources they require, and they cannot ask for anything outside their sandbox without crashing. Signed Applications are checked that they are from legitimate Developers, and Notarized Applications are delivered with the assurance that they have NOT been modified since their release by the Developer.

From MacOS 11 Big Sur onward, the system is on a Separate, crypto-locked System Volume, which is not writeable using ordinary means. Any unauthorized changes to the crypto-locked volume are quickly detected and you are alerted.

So you could store just about every malware known to mankind on your Mac, and your Mac would not get infected spontaneously. Scanning for virus-like patterns might make you feel a little better now, but it is outdated nonsense, and a tremendous waste of resources.

Nothing can become Executable Unless/Until you supply your Admin password to "make it so".

At that moment, the candidate to become executable WILL be scanned for virus patterns Apple keeps frequently updated, provided you allow:

[√] install system data files and security updates

Etrecheck is simply the best tool we have for eliminating the 20 questions back & forth.:)

your external drive does not have TRIM enabled. You should apply the terminal command:

sudo trimforce enable

enter your login password, which will NOT be echoed,

and follow the onscreen instructions

Is Symantec related to running Norton?

Yes, definitely.

What does TRIM do for the external hard drive?

Can't swear to it, but TRIM only helps SSDs, internal or external as far as I know.

disk4 - Seagate One Touch SSD 1.00 TB (Solid State - TRIM: No)