Yes, you should be able to connect to Agent for Mac using Viewer for Windows. Just make sure that all of your Remote Utilities modules are updated to the most recent version since an outdated component or a version mismatch (within the same platform) can sometimes affect performance speed or cause other connectivity issues.
I just tried to connect to the Linux Agent since updating. My Windows 11 machine using RU Viewer 126.96.36.199 sees the Linux machine (Zorin 16.3) as Online and tries to Authenticate, but says Access denied. I've confirmed the password on both viewer and agent. Both machines were restarted as were, of course, the respective RU apps.
Could you please try deleting your Linux Agent fully and downloading the latest Agent file on this page to see if this helps to resolve the issue? In addition, please also try deleting the connection in your address book and creating a new connection for Agent from scratch and see if the issue persists.
In this case, could you please enable the Viewer log on your Windows 11 machine and try connecting to the Linux Agent once again. If the issue still persists, please send us the Viewer log for examination. You can send it to [email protected].