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Perhaps you've been using your macOS setup for a while, and then you try to run Vim after a while. But then, instead of Vim starting up, an error is raised. Here's the error:
dyld: Library not loaded: /usr/local/opt/lua/lib/liblua.5.3.dylibReferenced from: /usr/local/bin/vimReason: image not found
So what caused this is that after using brew for a while, an older version of Lua that Vim relies on may have been uninstalled. To be perfectly honest, I have no idea exactly what may have caused this issue. But whatever it is, we need to fix it.
A good fix would be to search for all versions of Lua on homebrew. To do that, invoke the following command:
brew search lua
Which should output something like this:
==> Formulaelua ✔firstname.lastname@example.org@5.3luabindluajitluaradioluarocksluaver
Install Lua version 5.3.
brew install email@example.com
brew link --overwrite firstname.lastname@example.org
If there are other libraries that have been royally screwed up by Homebrew, and that Vim relies on them, then do follow the above pattern for all other libraries.