Cannot add any apps to Security & Privacy preferences on Mojave

Solution 1:

I ended up uninstalling Backblaze completely (even though it was the up-to-date version 5.4.0 that supports Mojave) and then reinstalled the same version from scratch.

This took care of the issue.

Solution 2:

Removing /Library/Application Support/com.apple.TCC/TCC.db file and restarting the system solved the problem.

In addition you probably have to restart in recovery mode and do a csrutil disable.

Then you can reboot and delete the file. Don't forget to csrutil enable in recover mode after it's done. And reboot again to use the system.

Solution 3:

I had same problem which was in my case caused by ESET. Now after I uninstalled ESET I am able to see list of apps in System Preferences > Security & Privacy > Privacy.

But whenever I add or delete app from the list my Mac strangely freezes like I can move cursor but I am unable to click on anything until restart.