System Extension Blocked - but can't allow extension

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System Extension Blocked - but can't allow extension

I installed macOS 10.13 High Sierra yesterday. This morning, when trying to boot up my VMWare for the first time since the install, I got the following error message:

"System Extension Blocked

A program tried to load new system extension(s) signed by "VMWare". If you want to enable these extensions, open Security & Privacy System Preferences"

The problem is that when I go to Security & Privacy, there is no option to 'Allow' the extension. I have read that this was a known bug in the beta versions of High Sierra, but surely this was fixed before release!?

I am also now getting exactly the same problem with my Symantec anti-virus. Same error message and still no option option to 'Allow' the extension.

I would be grateful to anyone that has been able to resolve this.

MacBook Pro with Retina display, macOS High Sierra (10.13)

Posted on Sep 27, 2017 1:24 AM

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Answer 1

Oct 5, 2018 2:53 PM in response to robGTR

See https://github.com/tekezo/Karabiner-Elements/issues/1017 where a million possible causes are listed, and workarounds.

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Answer 2

Oct 30, 2018 7:22 AM in response to fardeenfromt

Thank you, you've made my day!!!
Selecting the "Allow" button via tabbing and hitting Enter was unsuccessful, but then I've tried a Space, and it was finally depressed.

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