Add geos to install-dependencies-macos.sh (#5969)

Author: Meghan Jones

ci/install-dependencies-macos.sh

@@ -17,7 +17,7 @@ PACKAGE="${PACKAGE:-false}"
 
 # packages for compiling GMT
 # cmake is pre-installed on GitHub Actions
-packages="ninja curl pcre2 netcdf gdal fftw ghostscript"
+packages="ninja curl pcre2 netcdf gdal geos fftw ghostscript"
 
 # packages for build documentation
 if [ "$BUILD_DOCS" = "true" ]; then