Corel’s WinZip subsidiary has unveiled a major new release for the Mac edition of its renowned zip archiving tool. WinZip Mac Edition 4.0 focuses on improving its sharing tools, but also implements support for Retina displays.

The tool first updates its direct integration cloud tool to add support for Apple’s iCloud Drive as well as its own proprietary ZipShare service. This increases the number of supported tools to four, the other two being Google Drive and Dropbox.

WinZip’s ZipShare is a proprietary cloud-based service that can be used independently of WinZip. It offers free and paid-for accounts – free users can share zip files up to 50MB in size for a maximum of five days.

Access to WinZip’s ZipShare service has been added to version 4 of WinZip Mac Edition.

A Pro account removes the time limit, allows files up to 2GB to be shared and provides a variety of cloud-based file-management tools, including encryption and deliverability tracking. Prices start from $39.95 for an entire year; a monthly $9.95 package is also available.

WinZip Mac Edition 4.0 rounds off its sharing enhancements with a new convenient Share button, which provides direct access to any sharing options set up in OS X – these include destinations such as Facebook, Twitter and IM. WinZip uploads the file in question to the selected cloud service, then emails, posts or Tweets a link.

The new release is rounded off with support for high-DPI Retina displays, ensuring the app looks sharp on Apple’s latest generation displays.

WinZip Mac Edition 4.0 is available as a trial download for Macs running OS X 10.8 (Mountain Lion) or later. The full version can be purchased for $29.95. Also available are WinZip 19.0 for Windows and WinZip for iOS.