I checked with our developers on the issues. The issue with the Windows Login screen is caused by the screen capture being interrupted since the user that was running the Agent is logged out. This way, the image you see in the Full Control and View window is mismatched with what actually is displayed on the Agent machine at the moment.
As for the "Send Ctrl+Alt+Del" feature - this is expected behavior. In order to use this feature, you need to have the Host module running on the remote machine or to use the Restart Agent as feature.
Unfortunately, we couldn't reproduce the issue. However, I will forward the issue to our developers and ask for their input on this to see if there's anything that could be done to fix it. Sorry for the inconvenience.
Could you please clarify if you mean that when the remote session is interrupted or closed and you try connecting to the remote machine again, you see the Windows login screen with no password input field? If this is the case, then could you please let me know if you have the Lock workstation on disconnect feature enabled in the Connection Properties -> Additional properties tab? In addition, could you please send us a screenshot of the Windows Login screen with no password prompt? You can hide all sensitive information or send the screenshot to firstname.lastname@example.org if you don't want to post it on the forum.
For sending CTRL-ALT-Delete, I am using what the document calls the Toolbar, and I choose "send Ctrl-Alt-Delete" rather than hit these keys directly on the host.
Could you please clarify if the Agent runs under the standard Windows user?
Also curious, if I say "send Alt-Ctrl-Del" from the viewer, it brings up the task manager rather than what should happen if I do this key sequence on the host.
Could you please clarify if you're sending the key combination by directly pressing it on the local keyboard or do you use the Send Ctrl+Alt+Del command located in the Additional commands menu on the Toolbar of the Full Control and View connection mode?
I've checked with our developers once again - perhaps, the issue occurs specifically with this beta version release of the macOS. However, we will make sure to test the Viewer for Mac compatibility with the macOS beta version to see if there are any issues that we can fix in our subsequent updates.
Meanwhile, you might try running the Viewer from a stable macOS version (for example, Mojave or Catalina), if possible.
Sorry for the inconvenience. I'll get back to you if there are any updates on the issue.
Could you please try enabling the Use legacy capture mode feature and see if this helps to resolve the issue? This feature can be enabled in the Host Settings -> Other tab. After enabling the checkbox, please restart the remote Host.
In addition, please try updating your Remote Utilities installations to the latest 6.12 Beta 2 version - in this release, we have replaced the old driver-based mechanism with the new blank remote screen mechanism that allows adding a custom text to the remote screen when it is blanked. Here's a full list of Release Notes. Version 6.12 Beta 2 is available for the download on this page. When updating Remote Utilities please make sure to update both Viewer and Host/Agent as the version mismatch might lead to performance issues or some features not working.