I've been using a Trackman Marble for over 20 years. The ambidextrous trackball has saved me from repetitive stress injuries - because I can literally shift it across my desk and use the other hand! But Logitech is no longer willing to support it on Macs. Noo allows me to map the mini buttons to page-up/page-down - which isn't quite the same scrolling function Logitech's driver used to allow, but it works in most apps (not the App Store, for instance, which seems odd). But there isn't a currently supported ambidextrous trackball that's half as comfortable under my hands. So thank you for allowing me to continue using this old one. If the page-up/down worked in more apps, and in sidebars, I'd give 5 stars.

Thanks a lot for making this app. Maybe I missed it but detailed instructions might be helpful. In my case I installed Noo on Sequoia, and after granting Accessibility permissions in Privacy & Security, I Spotlight searched for Noo and opened it. Identifying and mapping mouse buttons in the Settings window was very straightforward. I’m not sure if it’s necessary but I added Noo as a Login item.

After granting persmissions the appseemingly does not open. This is not the case. After starting the app there is a mouse icon in the system toolbar (upper-right) that allows access to the configuration screen. I did not see it straight away and only stumbled on it by accident. I hope this helps others.

Simple to set up, but it's not working. Specifically, when I set up Ctrl up arrow as a shortcut for accessing mission control, it doesn't press Ctrl, only the up arrow. On their github page, there are several other reports of this issue that are years old, with no response. I appreciate the developer for creating this software, but they should take it down from the app store until they have the bandwidth to fix bugs in the most core functionality.I'm switching to Karabiner elements. Less straightforward UI, but actively maintained, and does more.