I updated my Macbook yesterday to the most recent update. After restarting I got spammed by tons of System Extension Blocked messages. System Extension Blocked Opening Security Preferences - THERE IS NO ALLOW BUTTON. Security options screen - no ALLOW button showing

How can I get around this? This is super frustrating. And it isn't just for Parallels. I get it for other apps too.

  • What operating system were you on previously? I think Apple started blocking unsigned Extensions. – JBis Jun 12 '18 at 23:21
  • It could've been 10.13. – zetetic Jun 12 '18 at 23:35
  • For now I've turned off SIP. Parallels suggested I disable it – zetetic Jun 12 '18 at 23:36
  • Yeah....not the best idea – JBis Jun 12 '18 at 23:36
  • what if you click the lock and authenticate, anything pop up or under the Advanced button? Failing that I would uninstall and then reinstall Parallels as a test case and see what happens. – Steve Chambers Jun 13 '18 at 0:16

I had the same problem. This answer on a different copy of this question is a solution with a tradeoff: https://apple.stackexchange.com/a/327816/292890

Summary is: cmd-R on boot to get Recovery Mode, then open Terminal by clicking on Utilities > Terminal. Once open, enter the following command:

spctl kext-consent disable

It disables kernel extension security confirmations altogether, which of course hurts your security, but it does prevent all the confirmation popups. That's also less drastic I think than disabling SIP entirely.


I'm glad I migrated my home folder and applications to a separate partition, because it turned out that not even reinstalling the OS solved this problem unless it was a clean install.

I had this problem in High Sierra, updated to Mojave but it persisted. Reinstalled the OS, but no change. Finally wiped the partition (or APFS volume in this case) and reinstalled Mojave on it. Linked in my home folder, and the problem was finally gone. The same should probably work for High Sierra.

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