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New Participant
December 3, 2025
Question

Meta XR Simulator 81.0 is not detected by Unity 6.2

I tried to install Meta XR Simulator as part of Meta All-in-One Package and with Meta Core SDK + Meta XR Simulator standalone setup, all components versioned 81.0

when I'm trying to enable Meta XR Simulator via any of menus where I could do it, I see the same log error every time:

[Meta XR Simulator Installer] finished downloading https://securecdn.oculus.com/binaries-download-auth/?id=32431411879837787

[Meta XR Simulator Installer] HTTP/1.1 404 Not Found

[Meta XR Simulator Not Installed] Installation failed, please report the issue on the bug tracker.

[Meta XR Simulator Not Installed] Try using different version. Open Edit > Preferences... > Meta XR > Meta XR Simulator and choose different selected version. 

 

Somehow Unity doesn't detect that Meta XR Simulator is already installed and tried to do it again with an error.

 

My Unity Version: 6000.2.14f1

My OS is Windows 11

 

Would love to provide any additional information

5 replies

New Participant
December 3, 2025

same issue with me

New Participant
December 4, 2025

same configuration and same issue with me.

New Participant
December 5, 2025

Open Preferences.

MetaXR -> Meta XR Simulator

Under Available versions, select 77. This will take a few seconds to respond but eventually selected version will say 77.

 

New Participant
January 13, 2026

It's astonishing to me that it's been more than a month later and this issue still hasn't been resolved. It's as if no-one at Meta is even using their own software.

New Participant
January 13, 2026

What's more, is that the latest version, (83) is just completely omitted from the dropdown menu. 

https://developers.meta.com/horizon/downloads/package/meta-xr-simulator-windows/83.0/