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

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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?

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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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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.

___________________________________________________________________________

Did you find this helpful? Let us know by completing this survey (takes 1 minute!)

View solution in original post

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

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

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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.]

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Works for me, Thanks so much.

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@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.

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Yes it did, thanks.

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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.

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

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

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Thanks!!!

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