LexiLoader (aka ApexDataLoader)
An OSX build of the Apex Data Loader application, quickly export, create or update data in your Salesforce.com organization.
Requires OSX 10.6 or later
Please Vote to make an OSX version of the data loader an official Salesforce.com release.
Downloadsv29 : Nov 12, 2013 (10.7Mb)
This version is signed with a developerId, so you shouldn't get any warnings from GateKeeper on OSX 10.8 or up.