"Could not open /dev/vmmon: No such file or directory." Error

[BobbyBoogie]

I recently cloned my Mac from a 2011 pro to a 2015 pro. I've also updated to High Sierra. My VMWare Fusion is now displaying this error:

"Could not open /dev/vmmon: No such file or directory.

Please make sure that the kernel module `vmmon' is loaded.

Failed to initialize monitor device."

I've reinstalled Fusion 8.5 and have rebooted several times. I still get this error on my existing virtual machine file, along with any new ones I try to create and open.

What can I do?

[GertJanA · Accepted solution]

Looking through the community, I found another topic about it: High Sierra "vmmon"

I had the same issue, but managed to sort it in a quicker way.

Open VMWare Fusion and start an image.

You will probable get the error of loading the vmmon kernel module.

Close VMWare Fusion.

Go To 'System Preferences' >> 'Security & Privacy' >> Check if you are allowed to run apps from identified developers and there is no mentioning of a block application.

In my case, VMWare Fusion was blocked, and after allowing it, the problem with the kernel module was resolved.

Hope this also fixes your problem.

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[Choorel]

Thank you so much for your answer.  It was an easy fix, but it had eluded me.

[Table23]

uR write. It' b workin' 4 me. ThankQ@GertJanA !

[RayTrask]

To VMWare staff.  This happened as of Feb 10, 2018 when I migrated from a 2016 MPB to a 2015 MBP.

[Yes I went back in time, as I can't stand the 2016 keyboard and even worse. I was at a customer site and a kink in the power cord combined with no light on the USB-C charging port cause a big problem which was the last straw.]

[IconnectChile]

Works for me, Thanks so much.

[Arjani]

@GertJanA Thank you so much!

I had to reinstall VMware Fusion 8 because of a failure in my SSD.

These few steps arranged the opening to my Windows 7 and 10 again. I have them stored on a external drive and this works perfectly.

[aalblake]

Yes it did, thanks.

[DJLambert]

Argh! why doesn't Fusion warn/prompt like other applications? I thought the 11.0.1 update borked something up so wasted time manually uninstalling. Bah.

[zeighty]

Worked for me... Thanks... This kind of problem is the perfect example of you should be searching before guessing.

[pranav_karakava]

Hello,
I have the same problem but it is with VMware Workstation player on Linux Mint.
Any help would be appreciated
Thank you.

[tasmity]

Thanks!!!