Program features:
* support for multiple connections at the same time;
* Easy file transfer using Drag & Drop;
* in the case of loss of connection when sending or receiving data, it is possible to resume the transfer;
* simple bookmark manager, the ability to import from Spotlight;
* integration with external editors (SubEthaEdit, BBEdit, TextWrangler, TextMate, Smultron, CSSEdit et al.);
* full support for AppleScript;
* data encryption;
* Russian localization.

What's new in Version 4.7.3:
New
* Shared bookmarks and history with CLI and Mountain Duck in application group support directory
* Importer for ExpanDrive bookmarks
* Authentication with PAM scheme

Bug Fixes
* Files are damaged after being synchronized with mirror action
* Certificate chain displayed not complete
* Permission failure deleting files looking for interrupted multipart uploads
* Support for Infrequent Access
* XML validation failure with AccessControlPolicy element
* Do not try list containers if default path is provided
* Faster connection setup with many containers
* Failure uploading multiple files

OS - MacOSX 10.7 or Later