Hello All
Sorry for that post. The problem got fixed by a restart.
I failed to follow the unwritten rule of "non-Linux computers" :-) When in
doubt---restart

After a restart I tried pymol with a new user profile and it worked very
smoothly
I tried back with my migrated original account ...and the buttery smooth
rotation returned....Phew :-)

Sorry for the confusion
Thanks
Hari




On Tue, Jan 10, 2017 at 6:49 AM hari jayaram <hari...@gmail.com> wrote:

> Hi ,
> I was happily using brew installed pymol 1.7.6  on my Macbook Pro (running
> OSX Sierra) and then had a hardware failure.
>
> I switched computers to MacBook Air running the same version of OSX
> (Sierra 10.12.2 ) and Xquartz (2.7.11) and now pymol ( and coot and other
> X11 using applications) refuses to function with smooth molecule rotation
> on even a 30kDa protein.
>
> I know the Macbook Airs are not that underpowered and am wondering how to
> troubleshoot the lack of smooth rotation.
>
> I have tried:
> Reinstalling pymol (now running 1.8)
> Reinstalling Xquartz ( still running 2.7.11)
> Using an external mouse
>
>
> ANd still have rotation that gets stuck. It starts rotating smoothly and
> then locks up. I can see the Mac red/yello/green circles go gray like X11
> is sleeping when this happens . It resumes after a second and rotation
> cotinues .
>
> Looking for others having the same issue does not pull up anything. I can
> get smooth rotation in Chimera and Cuemol2 on this new laptop so it seems
> to be a Pymol(Coot) X11/Xquartz issue that I dont know how to fix.
>
> Any ideas or help would be greatly appreciated since its two weeks till my
> faithful computer returns from a hardware fix.
>
> Thanks
> Hari
>
>
>
>
>
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