System Extension Blocked - but can't allow extension

Brilliant, thanks, this worked for me! Although I didn't reinstall OS X after making the above changes, as it appears that the database is re-created if it's not found during the next boot.

Thanks a lot for the help!

Hi Max,

Apple doesn't state it's secure. They have it disabled for a reason, such as installing third party security software which usually embeds other unnecessary and/or harmful malware....the third party software, for example, typically doesn't play well with Macs due to the design & especially with the heightened security within High Sierra. I would never put Norton, AVG, Avast, etc on my Mac. I've vseen the effects of such on Macs & it's not good. However, I'd feel comfortable with certain third party peripherals as long as there's no additional software from sources I don't trust, etc.

An external mouse that's compatible with the Mac however is usually fine, as is the case here.. it's just the third party software that sometimes accompanies it, that sets off a flag to the system or simply the fact that it's by an unidentified developer or a third party.

Thus, the workaround that a user posted here, assists in this manner.

Take care

This worked beautifully for me even on the same-desktop use where it was otherwise not working. (I'd disabled everything I could find such as BetterTouchTool and it still wasn't working.)

I found that if I moved the system window to the very top left of the screen the click point needed was:

tell application "System Events" to click at {576, 458}

Pro tip: I got this location by pressing Command-Control-Shift-4 which triggers the system to prepare to take a screen shot. Your cursor will turn to crosshairs with the pixel point you need shown with it.

Thanks Daniel for the tip off on this one!

Yes! Incredibly helpful. That did the trick. For those not familiar with Script Editor, you just need to hit the Play button after entering your own screen's values for {890, 460} in the example above.

It's also incredibly annoying that Apple would ship something this frustrating without any indication of why the Allow button doesn't work.

I had this same problem and fixed it by booting into Safe Mode, going to System Preferences -> Security and Privacy and then it allowed me to click the "Allow" button and it disappeared. I still had to reboot once more before VMWare would run my VM.

I had the same problem and solved it by temporary disabling a software running on my Mac : iTunes Volume Control (https://github.com/alberti42/iTunes-Volume-Control). Great soft by the way.

That software must catch key strokes, like other softwares cited here (Chrome for example).

Disabling it let me click on "Allow" button.

Like everyone I have been searching for a solution. I have a new iMac Pro I got back in December. Has macOS High Sierra 10.13.4.

When I tried to click allow for VMWare Fusion no response. Not in a Remote Desktop.

Out of desperation I hooked up a wired mouse and it worked. I was able to click the allow button with the cheap wired mouse.

Hope this helps somebody. So frustrating to be running into unexplained issues like this during the past few years on new macOS releases.

I was experiencing a similar issue where clicking "Allow" in Security preferences did nothing. I uninstalled and reinstalled the software, then booted up in safe mode. After doing this I was able to click "Allow" and the dialog dismissed. I then rebooted normally and the software was behaving normally.

Thank you, this is exactly what worked for me when I had the same issue with Sophos antivirus. (High Sierra 10.13.4) No need to uninstall the app first, though - just start in safe mode, open the security preferences, unlock and click Allow. It will prompt to restart.

I have this problem too with a Realtek driver. When pressing the "allow" button nothing happens.

I'm on a fresh 10.13.4 High Sierra install from USB using 1.0.1.5 drivers from Realtek.

There is nothing installed that would modify the mouse behavior, but I've tried using a wired USB mouse which didn't work either.

I've tried booting in safe mode, but the driver does not load so I can't click on the "allow" button.

This worked perfectly for me! Thanks so much. I had to allow the Script Editor to "control my computer", also via System Preferences, before it worked. But, luckily, you *can* enable that in a VNC session. (The request to enable this pops up automatically. It says something like, "Application so-and-so has requested to control your computer...")

Rather than trying to find out the right coordinates to click, I simply positioned the System Preference window such that the "Allow" button was at the bottom right corner of the screen (bottom and right edge lined up with the screen's edge). Knowing my screen resolution (1920x1080) I simply told the script to click a little to the right and a little further up (1900, 1070). Worked like a charm!

I cant believe that was the solution.

I couldn't allow the system extension even when I'm sitting directly in front of the mac and using the trackpad.

I found out the coordinates pressing cmd + shift + 4 and then hovered to where the button is.

Thanks mate

You don't have to use mouse or trackpad to click on the Allow button. Just use your keyboard to press Allow.

1. press tab few times till the blue border appears around the "Allow"

2. press enter or space and then now you have the new window were you can block or allow

I had VLC working in the background. There was an Error Dialog opened. That seems to prevent focusing and clicking ALLOW in the SYSTEM EXTENSIONS WINDOWS LOLZ! Close VLC and you will be able to click ALLOW :-)

macOS Hight Sierra really *** *** :-)

I had the same issue in regards towards other software preventing my click form registering in the Security & Privacy Panel, when the Allow request popped up. I just used the Tab key to navigate to the Allow button and then pressed spacebar to select it and it worked perfectly. Didn't need to disable anything. 🙂