What gimp.org / OSX download says is
So, they do expect individuals to compile it themselves, if it is not provided by the distribution. For example this is linux Debian13 where (1) is the package(s) for installation and (2) the help files in html format.
Since I use Gimp 3 from a different source, I do not have installed help either. You can ask the gimp developers to provide a MacOS specific help dmg but do not expect much.
Quote:GIMP's user manual can be dowloaded separately on the documentation website either as language-specific Windows installers or as source tarball.
So, they do expect individuals to compile it themselves, if it is not provided by the distribution. For example this is linux Debian13 where (1) is the package(s) for installation and (2) the help files in html format.
Since I use Gimp 3 from a different source, I do not have installed help either. You can ask the gimp developers to provide a MacOS specific help dmg but do not expect much.