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:
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
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