GIMP Version: 2.8.14
Operating System: Mac OS
OS Version: 10.11.3
GIMP Experience: Basic Level

List any relevant plug-ins or scripts:
a theme named "Pro"

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I don't know if this is the right section but it says "Gimp Help" and I need help with Gimp so...

I've downloaded some themes for Gimp but trying them I found out that a normal theme doesn't work completely in Gimp on a Mac. There are some things that I suppose are handled by the Linux gtk theme and not by the Gimp theme and so on a Mac they are left out and are not themed at all and so in a dark theme there are white panels that nothing have to do with the theme itself.
So I edited one of those almost-theme, a dark one, to try to make it work and I solved most of the problems but now I found a problem stronger than me.
I have the lists of comboboxes that have the same color for the text and the background... as you can imagine this create a little problem when you have to make choices with a combobox...
And thus I'm asking you my dear new friends if there are someone among you that know how to style the combobox items list in the gtkrc file of the theme

Love to help but I use Windows. There are a couple here who use Mac who may be able to help

If I understand correctly, you need to be able to see the text... yes? Others may be able to lead you better than I but, I think you would open the gtkrc of the theme you're working on with TextEdit and look in the "style" where text is defined and change to the colors that would suit your theme. My theme's text colors are:



If I've misunderstood, my apologies.

It's difficult to understand if the problem is due to something you have done, or if it's due to your window manager.

However, with a bit of experimenting:


Using this styling:


Kevin

Guys thank you all!!!
the right solution is the one from Kevin (thank you very much Kevin)
I've been fooled from the GtkComboBox widgetclass that was in the gtkrc file but when I tried to change it nothing happens, well it was the combo widget the one tha has to be styled that wasn't in the gtkrc file at all.

And so thank you very much to all of you again

d0k0, so glad you asked the question; it helps all us mac users.