This is a bug that has persisted for several years and iterations of OS X . Your suggested solution is the only one I have found to work.
Bill
William G. Scott
http://scottlab.ucsc.edu
> On Feb 3, 2016, at 8:04 AM, Scott Horowitz <[log in to unmask]> wrote:
>
> Something I found that helps remarkably with the problem of losing the Coot xquartz window in el capitan with multi-screen setups is to turn off the option in mission control for "Displays have separate spaces". Not sure why exactly it works, but it's completely solved the problem for me, and I don't have to toggle anything each time I want to use Coot.
>
> Scott
|