Using X11 for an older program

Michael keybounce at
Mon Dec 21 19:34:27 UTC 2020

On 2020-12-21, at 10:55 AM, Michael <keybounce at> wrote:

> This should be a simple one. I hope.
> I just installed a program that was compiled against the release version of mac's X11. Crashes on startup with this:
> dyld: launch, loading dependent libraries
> Dyld Error Message:
> Library not loaded: /opt/X11/lib/libpng15.15.dylib
> What symbolic links do I need? /opt has no X11 directory.

Ok, another question. I found this:


I cannot find the older version. What do I need to do to install both the current and the older version of this library at the same time?

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