Installing Rails on a Mac

What a lot of grief!

After trying more simple steps on another site (and failing) I eventually managed to get the following steps to work:


There were however some changes:

01: Make sure you download TextMate. I kept reading it as TextEdit for some reason, so just be aware of that when "mate ~/.bash_login" wont work.

02: One of the steps tells you to type "make ~/.bash_login". I found that adding the suggested text to that file made no difference when you log out/in or close the Terminal window. This was because a file named "~/.bash_profile" existed. If this file exists then you should modify it instead of the one mentioned in the article.

03: When trying to do "rake db:migrate" I would experience the following error:

otherwise you will experience the following error:
dyld: NSLinkModule() error
dyld: Library not loaded: /usr/local/mysql/lib/mysql/libmysqlclient.15.dylib
Referenced from: /usr/local/lib/ruby/gems/1.8/gems/mysql-2.7/lib/mysql.bundle
Reason: image not found
Trace/BPT trap

This is because the latest version of MySql has changed a path from lib/mysql to just lib/. To fix this problem you need to type the following (it's all one line):

sudo install_name_tool -change /usr/local/mysql/lib/mysql/libmysqlclient.15.dylib /usr/local/mysql/lib/libmysqlclient.15.dylib /usr/local/lib/ruby/gems/1.8/gems/mysql-2.7/lib/mysql.bundle

Right then. Now that those Hellish few days are over it's time to get annoyed with trying to write a website I suppose :-)


Kristin said...

Thanks for this post... the mysql fix worked like a charm and saved me a lot of headache

Bladehawke said...

Pointed me in the right direction for a related issue. I chose to fix the mysql libraries with:

for i in *dylib ; do \
sudo install_name_tool -id $PWD/$i $i; \

run from /usr/local/mysql/lib.

Ben Schwarz said...

Thanks. I had to change my path for the bundle to /opt/local/lib/ruby/gems/1.8/gems/mysql-2.7/lib/mysql.bundle
Otherwise, smooth sailing

Seth Wilson said...

Thank you!

dave said...

Dude! You just made my sunday morning. This helped big time.


Anonymous said...

Using datamapper with merb and mysql, has to also do:

sudo install_name_tool -change /usr/local/mysql/lib/mysql/libmysqlclient.15.dylib /usr/local/mysql/lib/libmysqlclient.15.dylib /usr/local/lib/ruby/gems/1.8/gems/do_mysql-0.9.1/lib/do_mysql_ext.bundle

Thanks, would never have worked that out!

stbnrivas said...

thank very much to both blogger and anonymous

After reinstall mysql sinatra don't run and show message like:

LoadError: dlopen(/usr/local/lib/ruby/gems/1.8/gems/do_mysql-0.10.0/lib/do_mysql_ext.bundle, 9): Library not loaded: /usr/local/mysql/lib/mysql/libmysqlclient.16.dylib

Using datamapper with sinatra do_mysql

try this

sudo install_name_tool -change /usr/local/mysql/lib/mysql/libmysqlclient.16.dylib /usr/local/mysql/lib/libmysqlclient.16.dylib /usr/local/lib/ruby/gems/1.8/gems/do_mysql-0.10.0/lib/do_mysql_ext.bundle

and works on