gistfile1.txt

Last login: Thu Jun 11 23:01:06 on ttys000
basalt:~ plasma$ source dnvm.sh
basalt:~ plasma$ dnvm install latest -r coreclr -u
Determining latest version
Latest version is 1.0.0-beta6-12005 
Downloading dnx-coreclr-darwin-x64.1.0.0-beta6-12005 from https://www.myget.org/F/aspnetvnext/api/v2
Download: https://www.myget.org/F/aspnetvnext/api/v2/package/dnx-coreclr-darwin-x64/1.0.0-beta6-12005
######################################################################## 100.0%
Installing to /Users/plasma/.dnx/runtimes/dnx-coreclr-darwin-x64.1.0.0-beta6-12005
Adding /Users/plasma/.dnx/runtimes/dnx-coreclr-darwin-x64.1.0.0-beta6-12005/bin to process PATH

As for dnvm update-self, its self explanatory:

~/.dnx/dnvm/dnvm.sh doesn't exist. This command assumes you have installed dnvm in the usual location and are trying to update it. If you want to use update-self then dnvm.sh should be sourced from ~/.dnx/dnvm 

dnvm was installed from homebrew, and is not in the usual location.