The latest version is not nearly as stable as the now-superseded earlier versions, which will not work with MacOS Big Sur. If you are on Catalina, do not upgrade to this. There are too many OS glitches, with the menu bar randomly disappearing from the top of the screen, pointer and screen items misaligning semi-regularly as the window jumps into a slightly incorrect postiion on the screen, but the pointer remains correctly orientated so that they are a few pixels out with each other. Stealing focus across multiple screens, so that all windows activate, rather than simply the screen that you're working in, meaning that anything running on the native computer gets bumped off of the screen until you minimise windows. Basically, the previous generation of this program worked much better. This does all of the same stuff, but the glitches reduce productivity. If you are running any version of MacOS before Big Sur, avoid it at all costs; if you're running Bug Sur, sadly you're stuck with it.