From: Sergio Perez (
Date: Tue Apr 20 2021 - 02:01:26 CDT

Hello John,

I think I have more info on this labelling problem. The problem seems to
happen because I have an external monitor connected to the laptop. If in
the Display settings of MacOS I change from optimise for the monitor y
change to optimise for Built-In retina display the problem disappears. Is
there a way to make this work for the optimization of the external monitor,
using the built-in retina optimization is very clunky. Thanks a lot
for your help!

On Wed, Mar 17, 2021 at 8:31 AM Sergio Perez <> wrote:

> 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!
> Sergio
> 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