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Enthusiast
Enthusiast

No Ethernet Connection VMware Fusion 12 macOS Big Sur Beta 6

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With the newly released version of VMware Fusion 12.0 I'm having the same problem I did with the Technical Preview in macOS Big Sur Beta 6.

When starting a Windows 10 x64 virtual machine, I receive the following error message:

Could not connect 'Ethernet0' to virtual network '/dev/vmnet8'. 

More information can be found in the vmware.log file.

Virtual device 'Ethernet0' will start disconnected.

Has anyone found a solution to restoring internet availability in the guest virtual machine?

Cheers

1 Solution

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Enthusiast
Enthusiast

I tried this suggestion from the Parallels Community and it seems to have solved this issue for me in VMware Fusion 12

Enter the following command in terminal before starting VMWare Fusion:

sudo rm /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist && sudo killall -9 configd

Cheers

Geoffrey

View solution in original post

61 Replies
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VMware Employee
VMware Employee

We have isolated the problem to a regression in Big Sur Beta 6 and that we reported the problem to Apple.

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Enthusiast
Enthusiast

Thanks for the quick reply!

I would recommend you add this caveat to the Release Notes, since I didn't find it there and suspect until this problem is solved by Apple others will be checking in here looking for help.

Geoffrey

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Contributor
Contributor

I'm on the same Big Sur Beta 6 and initially experienced the same issues as you but rebooting my Mac fixed the issue for me.

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Enthusiast
Enthusiast

I think given this issue was widely reported in the Tech Preview forum and was pretty clearly an issue with beta 6, its more than surprising you've launched this touting Big Sur compatibility before this has been resolved by Apple. I suspect a lot of people will purchase over the next few days and be incredibly disappointed/frustrated that this doesn't resolve the issue.

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Champion
Champion

Big Sur is beta software, so while Fusion 12 is compatible, VMWare can't be responsible for regressions in MacOS (just like the catalina regression in 10.15.6).   Big Sur shouldn't be on a production machine, so frustrations should be minimal.

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Contributor
Contributor

Fails with Dev Beta 7. 2020 13" MBP 32 GB.

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Contributor
Contributor

Welp, I wish I checked here first.

After struggling for an hour (rebooting, deleting & reinstalling Fusion, using EasyFind to delete every vmware-related preference and support file), I finally came here to look for help only to find it's a known issue.

This is a test machine, so I'll just patiently wait for the regression to be fixed...  🙂

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Contributor
Contributor

Beta 7 is now out, still the same issue.

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Enthusiast
Enthusiast

BBig Sur beta 7 is avalaible!

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Enthusiast
Enthusiast

Hi

Is it related to just certain Macs?  I have the problem on my 16-inch MacBook Pro, but a colleague of mine with an older 15-inch MacBook Pro is working fine with Beta 7 of Big Sur and Fusion 12.

Thanks,

Mike.

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Enthusiast
Enthusiast

That is correct.  Not all systems are affected.  So far I've noted owners of MacBook Pro 16" and 13" (2020) models reporting issues, which is why I suspect the problem may not only be attributable to "a regression error" with Apple.  I don't have any idea what VMware means by this.  I understand that this is Beta software and that Parallels also had embarrassing kernel panic reports with their first version of Parallels Desktop 16.0, but they quickly released a fix and I hope to be able to return to VMware Fusion as soon as possible in macOS Big Sur. 

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Contributor
Contributor

Just posting for adding info:

2018 15" MBP w/ i7

Running Big Sur beta v11 20A5364e

running VMW FPro12

Ethernet connection broken since the mid September update, was working fine before.

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Contributor
Contributor

Just adding the regression also affects my iMac (27", 2017)

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Contributor
Contributor

Same problem:

MBP 15" i7 2016

VMware Fusion Pro 12

MacOS Big Sur Beta build 20A5364e

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Enthusiast
Enthusiast

Sadly, I'm experiencing the same issue with macOS Big Sur Beta 8.

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Contributor
Contributor

Same issue here, Macbook Pro Retina 15 mid 2014, I think issue related to Apple, Because I am facing network issue in Parallel also.

I am on Beta 8 (20A5374i)

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Contributor
Contributor

Same here

Macbook air 2017

BigSur beta 8

Vmware Player latest version

New created Windows 10 pro 64

BR

Edvard

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Contributor
Contributor

Same Here ... Macbook Pro 15 inch 2019 - Dual i9

Big Sur Beta 8

Fusion 12.0.0

All VMs, new or existing give No Ethernet Connection error ...

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Enthusiast
Enthusiast

I tried this suggestion from the Parallels Community and it seems to have solved this issue for me in VMware Fusion 12

Enter the following command in terminal before starting VMWare Fusion:

sudo rm /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist && sudo killall -9 configd

Cheers

Geoffrey

View solution in original post