Release Notes are here.

Client/Server Compatibility

Universal Type Client and Core Client 6.1.x can only connect to Universal Type Server 6.1.0 or later. If your organization is running an older version of Type Server, do not upgrade to this version of Universal Type Client or Core Client.

Macintosh

Current version:

6.1.6 (released 24 April 2018)

• macOS™ v10.8 through 10.13
• 2.0 GHz or faster processor
• 1 GB available hard drive space for application files, plus additional space for fonts
• 100 Mbit/s or faster network connection
• An Internet connection and Safari® 7 or later or the current release of Firefox® or Chrome™ to view Help

Windows

Current version:

6.1.6 (released 24 April 2018)

• Windows® 7, Windows 8, Windows 8.1, or Windows 10
• 2.0 GHz or faster processor
• 1 GB available hard drive space for application files, plus additional space for fonts
• 100 Mbit/s or faster network connection
• An Internet connection and Internet Explorer® 10, Microsoft Edge, or the current release of Firefox or Chrome to view Help
  You need to have Internet Explorer installed in order for QuickComp to work properly. It does not need to be your default browser.