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https://issues.apache.org/jira/browse/GUACAMOLE-1238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Fratamico updated GUACAMOLE-1238:
----------------------------------------
    Description: 
Since upgrading my macOS Catalina iMac to Big Sur, I can no longer establish a 
VNC connection to the device. I am running Guacamole 1.2.0 and this was working 
just fine before upgrading to Big Sur. It looks as if Big Sur updated the VNC 
server/client and VNC viewers may need to be updated to work with Big Sur.

As an example, Real VNC released Viewer version 6.20.817 to address this issue:[
https://help.realvnc.com/hc/en-us/articles/360002253138-Release-Notes#ios-viewer-3-9-3-released-0-2]

  was:
Since upgrading my macOS Catalina iMac to Big Sur, I can no longer establish a 
VNC connection to the device. I am running Guacamole 1.2.0 and this was working 
just fine before upgrading to Big Sur. It looks as if Big Sur updated the VNC 
server/client and VNC viewers may need to be updated to work with Big Sur.

As an example, Real VNC released Viewer version 6.20.817 to address this issues 
- 
https://help.realvnc.com/hc/en-us/articles/360002253138-Release-Notes#ios-viewer-3-9-3-released-0-2


> Black screen when using VNC to connect to macOS Big Sur
> -------------------------------------------------------
>
>                 Key: GUACAMOLE-1238
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-1238
>             Project: Guacamole
>          Issue Type: Bug
>          Components: guacamole, guacamole-client
>    Affects Versions: 1.2.0
>            Reporter: Daniel Fratamico
>            Priority: Major
>
> Since upgrading my macOS Catalina iMac to Big Sur, I can no longer establish 
> a VNC connection to the device. I am running Guacamole 1.2.0 and this was 
> working just fine before upgrading to Big Sur. It looks as if Big Sur updated 
> the VNC server/client and VNC viewers may need to be updated to work with Big 
> Sur.
> As an example, Real VNC released Viewer version 6.20.817 to address this 
> issue:[
> https://help.realvnc.com/hc/en-us/articles/360002253138-Release-Notes#ios-viewer-3-9-3-released-0-2]



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