I've had this problem several times in the past, discussed it in other thread and even found a solution to this myself, but apparently this doesn't always work (I had to install a new KEXT recently) but now I believe I have a final solution to the problem.
The problem: when adding a new KEXT (Kernel Extension) you're asked if it should be allowed on your Mac. This comes up in the "Security & Privacy" system preference (select its "General" tab section) where you'll see an "Allow" button after you've installed the new KEXT from whatever installer has done that.
The problem is that this button sometimes doesn't work at all! You can press it all you want but it doesn't go away.
The cause: apparently this happens because 3rd party software might have been installed which captures mouse-clicks (here's another page which explains the problem in relation to Sophos software).
I assume this "feature" has been added so other people can't hack into your system and install malware or whatever outside your control. My problem is that I don't know of any such software on my Mac, and I don't know what to remove or disable in order to get this to work!
The solution: simple!
You just start (or restart) the computer into "safe mode", click the "Allow" button, then restart into normal mode again.
You might need to disable SIP (System Integrity Protection) first, though I believe I didn't have to, but I may be wrong.
Here's a step-by-step guide on what you need to do whenever you encounter an "Allow" button in the "Security & Privacy" system preference that won't respond when you click it:
The problem: when adding a new KEXT (Kernel Extension) you're asked if it should be allowed on your Mac. This comes up in the "Security & Privacy" system preference (select its "General" tab section) where you'll see an "Allow" button after you've installed the new KEXT from whatever installer has done that.
The problem is that this button sometimes doesn't work at all! You can press it all you want but it doesn't go away.
The cause: apparently this happens because 3rd party software might have been installed which captures mouse-clicks (here's another page which explains the problem in relation to Sophos software).
I assume this "feature" has been added so other people can't hack into your system and install malware or whatever outside your control. My problem is that I don't know of any such software on my Mac, and I don't know what to remove or disable in order to get this to work!
The solution: simple!
You just start (or restart) the computer into "safe mode", click the "Allow" button, then restart into normal mode again.
You might need to disable SIP (System Integrity Protection) first, though I believe I didn't have to, but I may be wrong.
Here's a step-by-step guide on what you need to do whenever you encounter an "Allow" button in the "Security & Privacy" system preference that won't respond when you click it:
- Start (or restart) the computer, then immediately press (and keep holding) SHIFT while the Mac starts up. This starts the Mac into "Safe mode". You can let go of the SHIFT-key when you see the startup progress-bar.
- Go to the Apple menu, select "System Preferences", then click on "Security & Privacy"
- Be sure to select the "General" tab, then click on the "Allow" button.
This time it should work (it'll disappear when you press it).
- A message will pop up, telling you to restart in order to enable the new software.
You can press the "OK" button and restart later, but you only have 30 minutes to approve it, so I recommend you press the "Restart" button which restarts the Mac right away.
- The computer will now restart, but this time don't do anything special (don't press any keys) and let it start up normally.
When done, go back into the "Security & Privacy" system preference to check if the "Allow" button has gone away as it should.
If it hasn't, try first to disable SIP, restart (into "safe mode"), then try clicking the "allow" button again. Remember to enable SIP afterwards (to keep your Mac more secure).
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