Issues of Upgrading to Yosemite Related to Homebrew

Fix brew command

In Yosemite the ruby command path changed, yosemite use ruby 2.0 as default also create a new path to link to ruby 2.0:

/System/Library/Frameworks/Ruby.framework/Versions/Current/usr/bin/ruby

You need to change ruby path in the first line of /usr/local/Library/brew.rb

After fix the brew command, it’s better to update brew itself to avoid other issues

brew update

After upgrade, you’ll get following error when try to run: postgres -D /usr/local/var/postgresql

FATAL:  could not open directory "pg_tblspc": No such file or directory

the fix is easy, just create those directories, those directories are gone after upgrade.

mkdir /usr/local/var/postgres/pg_tblspc
mkdir /usr/local/var/postgres/pg_twophase
mkdir /usr/local/var/postgres/pg_stat_tmp