EDITED : found fix for this particular issue using a wireless Logitech mouse: Downloaded latest Logitech SW Control Center at: Logitech Control Center for Macintosh OS X - Logitech Support
After upgrading to the new Mac OS Sierra last night, I immediately discovered--upon opening Eagle, that the zoom function for which the center scroll button of my Logitech mouse now causes both zoom and pan at the same time.
This is a major handicap for using Cadsoft Eagle (and I am way behind in my work, so this timing is terrible for me).
Is anyone else experiencing this problem?