System Extension Blocked - but can't allow extension

Good evening Rob,

I just tested a couple of my VMWare Fusion VMs, and did not experience your issue, however I did notice that there is a new release of VMWare Fusion (10.0) available. Have you contacted their support to ask if your specific issue might be addressed in the update?

Any word on this yet?

I spent over an hour on the phone with Apple Care yesterday, the two guys who tried to help me were stumped. They hadn't encountered this issue before, had some great ideas on the cause and possible solutions, but we were unable to fix it.

I ended up setting up some steps with the second line guy, I would go through and report back with the results.

We are pretty sure the MacOS installation is messed up in some way, which is weird since I already reinstalled it through a recovery boot, if a bit fell over during download or installation, a reinstall should have fixed it, but it didn't.

So I grabbed a USB hard drive, and installed MacOS on that, which works flawlessly. No issues whatsoever.

The next step I am currently working on is putting back a Time Machine back-up through recovery boot, to see if that fixes things.

If that doesn't work the last option the guys saw was to just do a clean install and take all my files out of the back-up and put them back manually.

I'm currently working on the back-up restore part, but when I wanted to start on that I came across another issue. Time Machine hasn't been making back-ups since High Sierra was installed! It couldn't. If I told it to make a back-up it would start the process, say "preparing" and hang there. I was also unable to open the back-up folder on the Time Capsule, I could connect to the Time Capsule, saw the back-up folder for my iMac, but opening it was impossible.

So I had to find a large enough USB Hard drive, spread all the files on it over my macbook and a few smaller drives so I can use this large one for a new full 1TB back-up, which has been running for over 7 hours and is about halfway done :/

So I'm hoping to restore that back-up overnight and wake up to a fully functioning machine, but I am afraid it won't do anything and I'll have to go the nuclear route tomorrow and do a clean install...

Any updates on your situations would be great, we might be able to help each other out.

Good morning Rob,

I have upgraded my VMWare Fusion to 10.1, and created a new VM with a fresh install of OS X 10.13, and I did receive the message re: Extensions you are posting about after installing VMWare tools. However the alert was generated by the guest OS inside VMWare Fusion and not the Host OS. I went into System Preferences / Security on the guest OS and the extension was listed to allow.

What version of VMWare Fusion are you running?

What guest OS are your running inside VMWare Fusion

Is your version of VMWare Fusion up to date?

After updating VMWare fusion, is the version of VMWare Tools up to date on your GuestOS?

Have you contacted VMWare support?

I have a similar issue. The difference in my situation is that the Allow button (for the extension) is there, but clicking it did nothing. The message, regarding the blocked Vmware extension is still displayed.

I also did a restore of High Sierra, have uninstalled VMware 10.0.1 (and remove all preferences and cache files) and reinstalled several times.

No luck. I also contacted Apple support. We tried several things, including copying the kext files into the system extensions directory. Nothing worked.

The only recommendation I have from VMware is to disable SIP. Currently I am not willing to do that.

Hoping a solution presents itself soon.

Mike

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

For anyone using Synergy remote keyboard and mouse from Symless, this also applies to us: the remote mouse cannot click the "Allow" button.

Please check out High Sierra fix for "System Extension Blocked"

In addition to the previous posts, here's one tip that you can use.

Use tab key to tab to the "Allow" button and then press the space key, so that it can help you trigger the click behavior.

This problem still exists on an install of High Sierra 10.13.5 over Sierra. No Allow button appears.

I'm going to try the 'spctl kext-consent disable' solution

What worked for me was enabling mouse keys in the accessibility preferences and the using i key to click instead of the trackpad.

I have this - disabling VLC works.

TAB does not move focus over the buttons :-( macOS High Sierra *** *** :-(

It does if you enable Full Keyboard Access (All Controls) in the Keyboard System prefs.

I spent a few hours with tech-support because I have this very same problem. Prevents me from seeing my 24 TB Thunderbolt 3 Lacie Big 6storage among other things because I cannot load the necessary extension since the option to allow does not appear. Affects sound recording too in Screenflow 7.1 (Cannot load computer audio driver). The senior support tech and I were unable to solve the problem and they will get back to me on Friday with an update (case ID ***********). At least I know I am not alone in this. Very frustrating.