From: Sergio Perez (
Date: Wed Mar 17 2021 - 02:31:34 CDT

Hello John,

Thanks for taking the time to do this!

 I have checked and it is definitely the night theme, I saw the color
change in front of me last night hahaha.

About the retina problem. Let me know if I can help you somehow or if some
progress is made.

I also have a question related to the future of macos implementations of
VMD. Do you there will be a solution to have somewhat stable VMD versions
for future macos releases every time mac updates the OS? By the way, I
totally understand how hard these things are in general and even more in
scientific programs which are generally understaffed and underfunded. I
just want to know if the future of VMD in mac relies on using virtual
machine or remotely accessing a linux computer or waiting for long periods
to update the OS. Again, I don't want to sound unsympathetic or ungrateful
for all the efforts that are put into this great program.

Best and thanks a lot!

On Wed, Mar 17, 2021 at 6:30 AM John Stone <> wrote:

> Hi,
> From your description, it sounds like you've got two major
> issues, one may have to do with the behavior or so-called "retina"
> display support with FLTK in VMD, and the other sounds like it's an
> issue with how FLTK interacts with the MacOS Big Sur "night" theme.
> Can you verify that the problems with the background colors and text
> go away if you set your Mac to the classic MacOS color theme?
> If that cures the problem, then we at least know for sure that it's
> a MacOS theme-specific issue. As for the retina display, I don't
> have an immediate suggestion that would necessarily make a
> difference here, so let's try the experiment with the theme change
> first and I'll see if there are recent FLTK bug fixes or updates
> that may pertain to the retina display support.
> Best,
> John Stone
> On Mon, Mar 15, 2021 at 08:06:51AM +0100, Sergio Perez wrote:
> > Hello,
> >
> > I am having some problems using this version of VMD:
> > VMD for MACOSXX86_64, version 1.9.4a51 (December 21, 2020)
> > with my mac with this characteristics;
> > Hardware Overview:
> > Model Name: MacBook Pro
> > Model Identifier: MacBookPro15,2
> > Processor Name: Quad-Core Intel Core i5
> > Processor Speed: 2,4 GHz
> > Number of Processors: 1
> > Total Number of Cores: 4
> > L2 Cache (per Core): 256 KB
> > L3 Cache: 6 MB
> > Hyper-Threading Technology: Enabled
> > Memory: 16 GB
> > System Firmware Version: 1554. (iBridge: 18.16.14347.0.0,0)
> > Serial Number (system): C02ZV0DFLVDP
> > Hardware UUID: 5529FD13-A16C-51BA-AF40-E55C251C67C3
> > Provisioning UDID: 5529FD13-A16C-51BA-AF40-E55C251C67C3
> > Activation Lock Status: Enabled
> >
> > It is extremely hard to select atoms with the mouse, to label them,
> measure
> > distances etc. You click where the atom is and there is no effect, if you
> > click around you might be lucky and click on some atom but it's nearly
> > impossible to select the one you want. Also some of the panels have a
> > black/dark background and are very hard to see since the font is also
> > black.
> >
> > Thank you very much for your help and I hope we can work this out. Let me
> > know if I can help you in some way.
> >
> > Best,
> > Sergio
> --
> NIH Center for Macromolecular Modeling and Bioinformatics
> Beckman Institute for Advanced Science and Technology
> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> Phone: 217-244-3349