When trying to install MongoDB Ver. 2.5.4 on my MacBook running Mavericks, I got an error as follows

'Agreeing to the Xcode/iOS license requires admin privileges, please re-run as root or sudo'.

Just FYI, I am the Administrator on my Mac machine.

After again agreeing to Xcode and installing it, I tried "brew update" again and this time I received the following

Error: undefined method 'to_sym' for nil:NilClass
Please report this bug:
http://github.com/mxcl/homebrew/wiki/troubleshooting
/usr/local/Library/Homebrew/cmd/update.rb:103:in 'report'
/usr/local/Library/Homebrew/cmd/update.rb:101:in 'each_line'
/user/local/Library/Homebrew/cmd/update.rb:101:in 'report'
/usr/local/Library/Homebrew/cmd/update.rb:23:in 'update'
/usr/local/Library/brew.rb:95:in 'send'
/usr/local/Library/brew.rb.95