ClassicII
Contributor
Contributor

Fusion 12 & Big Sur Beta 9 = Unable to create installation media

Is anyone else getting this ?

Thanks

9 Replies
hey_tommy
Contributor
Contributor

Yup, same thing here.

Worked fine with the Beta 6 full installer, but with the Beta 9 full installer, getting the dreaded "unable to create installation media" in Fusion 12 when trying to create a VM.

It's driving me nuts.

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Mikero
Community Manager
Community Manager

We're seeing it too... no workaround just yet.

I'm also finding that when I upgrade a Beta 8 VM to Beta 9, when it's done it falls into a kernel panic loop.

-
Michael Roy - PM/PMM: Fusion & Workstation
ClassicII
Contributor
Contributor

Mikero


Thanks for the confirmation! Hopefully we can figure out what the issue is soon.

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wila
Leadership
Leadership

Interesting, I had no problem with upgrading from beta8 to beta9 (otherwise I would not have been able to write that metal rendering blog post)

--

Wil

| Author of Vimalin. The virtual machine Backup app for VMware Fusion, VMware Workstation and Player |
| More info at vimalin.com | Twitter @wilva
scheblein
Contributor
Contributor

I literally was on the verge of deleting my b6 copy, then tried to install b9 in Fusion, got the error you have and then found this! I successfully extracted the b6 install from my trashcan! :smileygrin:

Mikero
Community Manager
Community Manager

Following up a bit here, we do see that the disk layout has changed, so we'll need an update to accommodate it unless we can figure a workaround script or something.

-
Michael Roy - PM/PMM: Fusion & Workstation
CaliDuck916
Contributor
Contributor

I too am seeing this, bummer!
Screen Shot 2020-10-08 at 10.26.48 AM.png

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EMR
Enthusiast
Enthusiast

I don't suppose my experience will be considered the perfect solution, but it might help someone. I was also faced with the impossibility of creating a new virtual machine using the Big Sur Beta 9 installer, so I simply enrolled a Mojave virtual machine in Apple's beta program and, from within Mojave, I upgraded to Big Sur Beta 9. The only issue is that you need plenty of available space on your virtual disk, or the process will fail. Other than that, Big Sur installed with no issues.

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jstaubr
Contributor
Contributor

If you still struggle with this I got around it on 11.0.1 with this guide.

https://www.modtitan.com/2020/10/building-macos-big-sur-beta-vm-with.html

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