We currently provide installers for Go for Windows (an .msi file) and macOS (a .pkg file).

Both installers add $GOROOT/bin to PATH. This lets users run commands like go build without having to edit PATH themselves.

However, users still need to edit PATH in order to run binaries installed with go install or go get. This introduces unnecessary confusion for new developers. To avoid this, both installers should add $GOBIN to PATH as well.

(Note that neither GOBIN nor GOPATH are likely to be set when an installer runs. If they are set, we should respect them; the goal is just to ensure that the directory where go install writes binaries is added to PATH).