Application windows move erratically with two monitors

Originator:dloewenherz
Number:rdar://22105831 Date Originated:01-Aug-2015 05:01 PM
Status:Duplicate/22037937 Resolved:
Product:OS X Product Version:10.11 Beta (15A235d)
Classification:Serious Bug Reproducible:Always
 
Summary:
When dragging a window in OS X El Capitan, clicking on the window moves application frame unexpectedly and sometimes offscreen, where the window can no longer be manipulated or moved.

Steps to Reproduce:
1. Using a MacBook Pro with El Capitan installed, connect a Thunderbolt Display.
2. On the MacBook display, move a window to the center of the screen.
3. Click on the application frame.

Expected Results:
The window does not move until the mouse cursor drags the window to a new location.

Actual Results:
The window moves up and to the left. See attachment.

Comments


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at bugreport.apple.com before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!