Thank you for your message.
Actually, we have already released a Beta version of Viewer for Mac. As of this writing, it's version 1.0.4.q Beta 4
which is available for the download on this page
Here's a list of features that are already available in the most recent Beta version of Viewer for Mac and a thread where our users can provide your feedback or bug reports: https://www.remoteutilities.com/support/forums/forum11/1399-viewer-for-mac-and-linux-_-beta-testing
As for the Host/Agent for Mac/Linux - we plan to release it this year, but, unfortunately, we cannot provide a more specific ETA on it yet. Hopefully, we will be able to release the first beta in a few months.
However, we will make sure to notify all our users when Host/Agent for Mac/Linux is released. Sorry to keep you waiting.
Please let us know if you have more questions.