Q - 1 - MacUpdater.app 25 notifications
A - 1 - Unless one has a Paid Account - this site is know to Bundle some of their Software with Malware and Adware. See A-2 below for possible solution . Any of this could be the source of YouTube playing even when designated not to auto-play
Q -2 More than one antivirus app - This computer has multiple antivirus apps installed.
Antivirus software: Apple, CleanMyMac, and One Periodic
A -2 There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX Foundation and Permission Limitation. Remove them as per Developers Specific Instructions.
The Only thing this Antivirus software is protecting is the Bank Account of the Developers and for zero return to the User aside from the problems this software creates.
The The Built in Security is all that is required to protect the computer.
Should “ Certain & Specific Software “ referenced from above be installed - it will negatively impact macOS. It is suggested, to download directly from a respected ASC Contributor, the application Malwarebytes for Mac.
It is free or paid for added features.
Run the Application and it should remove the malware / adware. Once done, restart computer and test.
Q - 3 Configuration Files: /etc/hosts - Count: 100481
A -3 This is totally not normal. To be honest - not sure of a 100% correct solution. Perhaps a More Experienced Contributor will pickup this question with some insights and solution. This could be another indication of the computer is badly infested with Adware and Malware. If so, the Malwarebytes may remedy this
Q -4 - Kernel panics - This system has experienced kernel panics that could be related to 3rd party software.
A - 4 - Review the Kernels extension installed from this report and investigate which one(S) are the cause and or need removal or updating
Q - 5 - No Time Machine backup - Time Machine backup not found.
A - 5 - A Time Machine Backup is very useful and can be used to Revert to Previous Working macOS.