"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!!!

[maxtamtam71]

Well spotted. That makes me more and more convinced that MAC OSX is getting more and more unusable for VMware usage and any professional usage in general except playing music and doing pictures.