To pinpoint what goes wrong in an NS Emacs, you can edit "nsterm.h" and uncomment the line defining the NSTRACE_ENABLED macro. If you run Emacs from a terminal window, you will get debug output of all relevant functions called, hopefully this will tell you what went wrong.

-- Anders

On Sat, Feb 4, 2017 at 7:54 PM, Artemio González López <artemiog@mac.com> wrote:

Emacs 25.1 (as well as 25.1.1rc) crashes at start under the latest developer beta of macOS (10.12.4 beta 1), producing the error message

2017-01-25 23:50:19.458 Emacs-x86_64-10_9[864:21038] Error -
planarGetBytes count (65536) is not a multiple of
bytesPerRow (96).

I've already reported this as a possible bug, but would like to check if anybody has a pointer as to what maybe the problem and how to fix it. Any help would be appreciated.

Artemio

artemiog@mac.com