Unfortunately, we cannot provide a more specific ETA on the release of Host for Mac/Linux yet. We hope to release it by the end of this year and will do our best to provide Host for Mac/Linux as soon as we can. Sorry for the inconvenience.
Meanwhile, as a temporary alternative, please consider using Host on Linux Mint via Wine - we've previously received feedback from our other users who were successfully using Remote Utilities on Linux machines using Wine.
Being a first time poster and user of RemoteUtilities I wanted to say that I am glad I found this program. I have been using another remote desktop program for years until I got tired of them flagging my use as commercial and trying to force me to pay for a monthly subscription. I was pleasantly surprised to see a free registration that allows both personal and commercial use included in the program. So far I have been using your program for less then a week but have grown to love the ease of use. I understand that a linux host is being worked on and will wait for it's release since one of my computers does contain Ubuntu 18.04 and a host for it will be a plus to me. I for one (1) am glad I found this program.