官方页面:http://www.mono-project.com/docs/about-mono/supported-platforms/osx/#uninstalling-mono-on-mac-os-x
Uninstalling Mono on Mac OS X
Run this script in a terminal:
#!/bin/sh -x #This script removes Mono from an OS X System. It must be run as root rm -r /Library/Frameworks/Mono.framework rm -r /Library/Receipts/MonoFramework-* for dir in /usr/bin /usr/share/man/man1 /usr/share/man/man3 /usr/share/man/man5; do (cd ${dir}; for i in `ls -al | grep /Library/Frameworks/Mono.framework/ | awk '{print $9}'`; do rm ${i} done); done