How to Fix MySQL and Rails Compatibility Issues on Snow Leopard?

MySQL and Rails on Snow Leopard: A Solution

Following an upgrade to Snow Leopard, Rails applications may encounter difficulties running due to the removal of the bundled mysql.rb driver in Rails 2.2. To resolve this issue, the mysql gem must be installed. However, attempts to install the mysql gem using sudo gem install mysql may fail with an error message indicating a missing dynamic library.

To install MySQL and configure it to work with Rails on Snow Leopard, follow these steps:

1. Download and install the 64-bit MySQL 5.1.37 from mysql.com.
2. Run the following commands in Terminal:

sudo gem update --system

sudo env ARCHFLAGS="-arch x86_64" gem install mysql -- --with-mysql-config=/usr/local/mysql/bin/mysql_config

These commands will install the correct version of the mysql gem and configure it to use MySQL's configuration file.

Additional Tip:

If you encounter persistent issues, uninstall any leftover MySQL gems from previous versions of Mac OS (10.5) to avoid potential conflicts.

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