There's been a few people who have asked how to uninstall various Xamarin products and at least some of those folks thought that they had to reinstall Mac OS X to uninstall Xamarin, so I wanted to post a way to do it without reinstalling your OS.
To uninstall Xamarin Studio, you'll want to run the following commands from a Terminal:
sudo rm -rf /Applications/Xamarin Studio.app
rm -rf ~/Library/Caches/XamarinStudio-5.0
rm -rf ~/Library/Logs/XamarinStudio-5.0
rm -rf ~/Library/Preferences/XamarinStudio-5.0
rm -rf ~/Library/XamarinStudio-5.0
To uninstall Xamarin.Android, run the following commands in a Terminal:
sudo rm -rf /Developer/MonoDroid
sudo rm -rf /Library/Frameworks/Xamarin.Android.framework
rm -rf ~/Library/MonoAndroid
sudo pkgutil --forget com.xamarin.android.pkg
To uninstall Xamarin.iOS, run the following commands in a Terminal:
sudo launchctl unload /Library/LaunchAgents/com.xamarin.mtvs.buildserver.plist
sudo rm -f /Library/LaunchAgents/com.xamarin.mtvs.buildserver.plist
sudo rm -rf /Developer/MonoTouch
rm -rf ~/Library/MonoTouch
sudo pkgutil --forget com.xamarin.monotouch.pkg
sudo pkgutil --forget com.xamarin.xamarin-ios-build-host.pkg
To uninstall Xamarin.Mac, run the following commands from a Terminal:
[TODO: fill this section in]
To uninstall the Mono MDK, run the following commands from the Terminal:
sudo rm -rf /Library/Frameworks/Mono.framework
sudo pkgutil --forget com.xamarin.mono-MDK.pkg