Where can you find pixelmator for Mac OSX 10.5.8?

Pixelmator requires Mac OS X 10.6.6 or later, so it is not compatible with Mac OS X 10.5.8. If you are using an older version of the operating system, you might consider looking for alternative image editing software that supports your version, or upgrading your OS if possible. Some older versions of software might be available through third-party websites, but caution is advised due to potential security risks.