How to install Mono on macOS so mono works in terminal?
I'm trying to get a Mono install running on a mac (OS X version 10.10.5), and while the install states that it's completed successfully, I'm not able to call mono from the terminal.
To install it, I ran uninstallMono.sh as root to ensure we didn't have any leftover cruft, then ran MonoFramework-MDK-4.0.4.1.macos10.xamarin.x86.pkg. The installer appeared to complete successfully, but an attempt to call mono returns
-bash: mono: command not found
The mono framework does appear to be installed:
Lees-Mac-Pro:Downloads kevinmack$ cd /Volumes/Macintosh\ HD/Library/Frameworks/
Lees-Mac-Pro:Frameworks kevinmack$ ls -l
total 32
lrwxr-xr-x 1 root wheel 71 Jan 20 2015 AEProfiling.framework -> ../../Applications/Motion.app/Contents/Frameworks/AEProfiling.framework
lrwxr-xr-x 1 root wheel 74 Jan 20 2015 AERegistration.framework -> ../../Applications/Motion.app/Contents/Frameworks/AERegistration.framework
lrwxr-xr-x 1 root wheel 74 Jan 20 2015 AudioMixEngine.framework -> ../../Applications/Motion.app/Contents/Frameworks/AudioMixEngine.framework
drwxr-xr-x 8 root admin 272 Sep 12 11:24 Mono.framework
lrwxr-xr-x 1 root wheel 60 Sep 9 22:16 NyxAudioAnalysis.framework -> /System/Library/PrivateFrameworks/NyxAudioAnalysis.framework
drwxr-xr-x 5 root wheel 170 Jan 20 2015 PluginManager.framework
drwxr-xr-x 8 root wheel 272 Sep 9 22:19 iTunesLibrary.framework
...but it isn't present in /usr/bin and attempting to find its executable using which mono returns nothing.
Solution 1:
In OS X El Capitan, run the following in Terminal to support mono command
export PATH=/Library/Frameworks/Mono.framework/Versions/Current/bin/:${PATH}
Solution 2:
Update (since this is still getting views two+ years later):
The latest versions of Mono (5.x) installation process creates a file (mono-commands) in /etc/paths.d that contains the path of:
/Library/Frameworks/Mono.framework/Versions/Current/Commands
So /usr/local/bin is no longer used...
Original
Newer versions of mono comply to the "El Capitan" requirements of not installing anything into /usr/bin and thus now /usr/local/bin is used. I am not sure which mono 4.x release that started in...
But I would assume that you do not have /usr/local/bin in your path(?), try:
export PATH=/usr/local/bin:${PATH}
which mono
which mcs
In my case, I have 4.2.0 installed:
$ which mono
/usr/local/bin/mono
$ which mcs
/usr/local/bin/mcs
$ mono --version
Mono JIT compiler version 4.2.0 (explicit/2701b19 Mon Aug 31 09:57:28 EDT 2015)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
$ cat `which mcs`
#!/bin/sh
export PATH=$PATH:/Library/Frameworks/Mono.framework/Versions/4.2.0/bin
export PKG_CONFIG_PATH=/Library/Frameworks/Mono.framework/External/pkgconfig:/Library/Frameworks/Mono.framework/Versions/4.2.0/lib/pkgconfig:/Library/Frameworks/Mono.framework/Versions/4.2.0/share/pkgconfig:$PKG_CONFIG_PATH
exec /Library/Frameworks/Mono.framework/Versions/4.2.0/bin/mono $MONO_OPTIONS /Library/Frameworks/Mono.framework/Versions/4.2.0/lib/mono/4.5/mcs.exe "$@"
Solution 3:
It is better to use the next export:
export PATH=$PATH:/Library/Frameworks/Mono.framework/Versions/Current/bin/
- You don't modify the previous order of PATH (It's very important!!)
- You will use the current version (when update the version it isn't necessary to change the variable PATH)
Another option (best option) is to include a new line at the end of the file /etc/paths with the content: /Library/Frameworks/Mono.framework/Versions/Current/bin
In this case, the path will be available for all users on the system.