So first I'd like to say Unity Hub seems like a great addition to the Unity system. I've always got like 3-6 versions of Unity installed on my computer so having a tool to manage these installs and help to remember which version of unity a given project was being worked on in is really helpful. Also being able to install new build targets after you have installed unity will be useful now and again when I forget to download one, again. The one little piece of feedback I have is the way that the tool acts on a mac when you open a project. Right now Unity Hub uses the Genie effect to dock itself, which makes some sense as I don't need HUB after I've opened the Editor. But it seems to me kind of weird especially since the editor doesn't open a window or do anything immediately, almost like HUB has stopped working. Also if a window is minimized to the doc if you use command/apple key + tab to try to switch back to hub the window won't come to the foreground. I think what would be better would be for the hub window went into a mode where it went inactive and showed either a spinner or status bar and the text "Unity Editor Launching" and then when the editor finally opens it will just naturally be on top of the HUB window. This is being pretty pick for a tool that is 99% awesome, I'm just trying to get it to 100% awesome.