RegexBuddy 3.1.1 works great with CrossOver 9.0.0 with only a few issues. Perhaps the worst of the issues is that you can't load the library of regular expressions that comes with the application. Another issue that is mostly minor and is actually harmless is that on occasion RegexBuddy will cause an access violation and display an error dialog like the one shown below. If you get this error dialog all you have to do is dismiss it and keep on working in RegexBuddy. I've never had a problem with it.