MacVim not loading plugins from my ~/.vim directory

Steps to reproduce

1. Do a search
2. list loaded scripts with :scriptnames

All plugins load as expected running /usr/bin/vim in a terminal.

Expected behaviour

1. Expect EnchantedVim to cause all searches to be very magic; does not occur
2. Expect to see EnchantedVim in loaded scripts; does not occur

Version of MacVim

r183

MacVim installation method

downloaded from release

Environment

macOS Sonoma, MBP

Logs and stack traces

Vim and MacVim configuration where issue is reproducable

vimrc.txt

gvimrc.txt

How was MacVim launched?

• by launching MacVim.app in macOS (by using the Dock, Spotlight, or the open command)
• by running mvim/gvim in the terminal

Issue has been tested with clean configuration

• by running mvim --clean (or gvim, supplied by MacVim distribution). You can also use the File → "New Clean Window" menu item within MacVim.
• by running vim --clean (in terminal, supplied by MacVim distribution)
• by running vim --clean (in terminal, other suppliers, e.g. /usr/bin/vim)

Start with the attached vimrc.txt and gvimrc.txt, then reproduce the issue by launching MacVim.app and inspecting :scriptnames after a search. Compare this with the terminal Vim behavior and the reported clean configuration result. Done means the ~/.vim plugins load in MacVim.app and EnchantedVim changes search behavior as expected.