There are many good FTP clients but some of them are paid software. Finding good free software is little difficult task. So I am just listing 2 best free FTP clients for Mac OS X.

Best Freeware FTP Clients for Mac OS X

1. FileZilla – My number 1 choice for FTP client whether it is for Windows, Linux or Mac user. I use it regularly and not found any problem. I don’t ever have thought of upgrading to any paid FTP client software as it does all jobs I need. FileZilla is open source software distributed free of charge. There are lot of support available through there forums, the wiki. Some of its features are – Supports FTP, FTP over SSL/TLS (FTPS) and SSH File Transfer Protocol (SFTP), Cross-platform. Runs on Windows, Linux, *BSD, Mac OS X and more, Supports resume and transfer of large files >4GB, HTTP/1.1, SOCKS5 and FTP-Proxy support and much more.

2. Cyberduck – Cyberduck is an open source FTP, SFTP, WebDAV, Cloud Files and Amazon S3 browser for the Mac. It’s easy to use interface help you done your work quickly. The outline view allows browsing large folder structures efficiently and you can quickly preview files with Quick Look. Amazon CloudFront and Cloud Files from Rackspace can be easily configured to distribute your content in the cloud. Cyberduck supports FTP (File Transfer Protocol), FTP/TLS (FTP secured over SSL/TLS), SFTP (SSH Secure File Transfer) file transfers. This is multilingual software which can be used in many languages. With its many great features it can be your favorite FTP client.