Subject: Re: bug#49268: 28.0.50; emacs could not load dump file not built for this Emacs executable

From: Jim Myhrberg <[email-masked]>
Date: Tue, 29 Jun 2021 13:09:41 +0100

As of 26th of June, Emacs.pdmp is now located in "Contents/MacOS/libexec/Emacs.pdmp" within the application bundle, instead of the old "Contents/MacOS/Emacs.pdmp" location which your error is about.

I'd say try manually trash the old Emacs.pdmp file and see what happens? Otherwise try "make clean" and rebuild Emacs again.