

Dear All,

I tried to install the Rmpi for Mac OS X, by following this:
http://www.stats.uwo.ca/faculty/yu/Rmpi/


I successfully installed the Xcodeand verified thegcc.
When I installed the Homebrew, I got the message as below:

Rohmatuls-MacBook-Pro:~ rfajriyah$ ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"
-e:67: warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
-e:96: warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777
==> This script will install:
/usr/local/bin/brew
/usr/local/Library/...
/usr/local/share/man/man1/brew.1
==> The following directories will be made group writable:
/usr/local/lib/pkgconfig
/usr/local/share/info
==> The following directories will have their group set to admin:
/usr/local/lib/pkgconfig
/usr/local/share/info

Press ENTER to continue or any other key to abort
-e:34: warning: Insecure world writable dir /usr/local/bin in PATH, mode 040777

then I quitted (aborted the process).

After read some sources, I guessed, I should change the PATH first. 
But there are things that I am not sure about:
a. Should I un-install the Xcode, change the PATH and re-install it again?
b. When I change the PATH to  /usr/local/bin, what will happen to my R at /usr/bin? Should I un-installed (delete) and re-install it at /usr/local/bin?

Apologise for the really basic questions.

Thank you very much in advance.
With kind regards,
Ema
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