Norton 360 install fails due to system extension disabled running OSX 11.5.2

Well, most of the experts (as you have seen) strongly recommend against the anti-virus package, you OUGHT to be able to install it, and the cloud storage utilities, if you want to. Generally, when you can't install something it means there is something else that is installed that is interfering with this install.

Do you have any other anti-virus, security packages already or previously installed? They can interfere like this. Uninstall them before trying this new installs. You can always reinstall them later.

You can download and run Etrecheck, written by an Apple Discussions expert. Post the output here using the Additional Text button below. One of those experts may identify what is interfering. Etrecheck simply shows what is installed or running in the background, it keeps everything else anonymous.

Another thing you can try, which is something of a band aid because it leaves the problem there, is to boot into Safe Mode and then try to install from there.

Another option -- create a new user with administrator privileges (this is always good to have for troubleshooting long term anyway). Try installing from that new vanilla administrator user. It might work if there is something particular to your account that is hindering the installs.

I would try installing the Box cloud storage tools first. If that works, then I would stop there and declare victory, but if you must you can then try the Norton package, although I would recommend not installing that software. As was pointed out earlier, the MacOS under Big Sur (and Catalina) now resides on a read-only separate volume and neither you nor anyone else can infect it or change it in any way. Only an Apple certified/verified software installer can do that.

We have commercial enterprise complete antivirus etc. protection package as mandated on all our employer's thousands of Macs (and PCs) and early this morning an update was pushed out that made all the computers unable to connect to WiFi nor ethernet nor any network. We got instructions via cellphone as to how to unravel that.

FWIW, most everyone knows what Norton's claims to be (AV).

The OS now is sequestered on a read only (otherwise inaccessible) volume on your hard drive. That means neither you nor your Norton's cannot function/write to that volume since it has no access > ergo, it is completely superfluous.

Having said that, I am glad to hear that worthless app has not caused any problems for you previously (or you may not have realized it).

https://support.apple.com/en-us/HT210650

https://developer.apple.com/news/?id=3xpv8r2m

glhickerson wrote:

I'm having the same issue with installing the Box Drive client that I was having with Norton. Any ideas on how to resolve the issue and install the software?

I would contact Box support and ask: https://support.box.com/hc/en-us

I have nothing to say about Norton that hasn't already been said.

Do not install any third party apps that claim to clean, protect, manage, etc. These apps are not required and they may interfere with the operating systems built in protection, etc.

Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation. The Built-in Security of Big Sur is all that is required.

There are no known Viruses in the wild that self replicate and affect macOS. There are Malware and Adware that does affect macOS and are often times downloaded as part of an Application from Third Party UnTrusted Site and get installed along with the Application.

Although one may have used Norton previously - it does not change the fact Viruses for macOS do on exist for Big Sur or previous version of macOS.

Their Marketing is predicated on an untrue and false assumption that virus do exist for macOS. They may even try and claim that Malware and Adware will be blocked if you user their Software. That has been covered earlier in this posting.

I know what BoxDrive is. My comment was about Norton.