Re: problem with Emacs 25.2.1 under Mac OS 10.13 beta 5

[Eli Zaretskii <eliz@gnu.org>]

> From: Artemio Gonzalez Lopez <artemiog@mac.com>
> Date: Mon, 14 Aug 2017 11:35:39 +0200
> 
> I've been using Emacs 25.2.1 (downloaded from emacsformacosx.com) with 
> several developer betas of Mac OS 10.13. I had no problem until the 
> latest (beta 5), which does not render properly the fringes and the 
> header/mode lines in Emacs windows. More precisely, it renders them in 
> solid black, which in particular makes it virtually impossible to read 
> the text messages in the header/mode lines. I am attaching two png 
> files, showing how a window is rendered now (Fig. 1) and how it should 
> be rendered (Fig. 2). This is probably a bug in macos's CoreGraphics (in 
> fact, I've filed a bug report to the effect). However, while the bug is 
> fixed (I hope in the next beta release!), I thought perhaps there could 
> be a way of manually setting the background color of the fringes and 
> header/mode which is not overridden by macos. Any suggestion in this 
> respect would be very welcome!

AFAIU, the problem manifests itself in the inability of Emacs to load
the colors it wants to use.  So one possible workaround would be to
find out which colors it _can_ load, and customize the 'fringe' face
to use one of those colors.

To find which colors are available, use "M-x list-colors-display".