Mac freezes

Safe Boot from the HD, (holding Shift key down at startup), does the problem occur in Safe Mode?

Safe mode attempts to repair Disks & clears lots of caches, so if Safe Mode works try again in regular boot.

˜What all 3rd party extensions are you running?

EtreCheck is a simple little app to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac.

http://www.etresoft.com/etrecheck

Pastebin is a good place to paste the whole report...

https://pastebin.com/

Or use the paperclip at the bottom of a Reply to attach the full report here. :)

Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck.

Please uninstall the Symantec AV App per the developers instructions. At best it has no value and is likely the cause of your problems. If simply kept up-to-date and otherwise left alone Mac OS will remain secure and trouble free. Introducing third party AV apps circumnavigate Apple's security and offers nothing in return except a slow and unstable version of Mac OS.

I’d suspect a hardware issue, I recommend taking it to an Apple Authorized Service Provider to be diagnosed.

OK, thanks, have you removed Symantec/Norton yet?

It will continue to do so until you do what was recommended, uninstall the AV App.