patch 8.0.1572: Mac: getting memory size doesn't work everywhere commit https://github.com/vim/vim/commit/362dc33835e3ec5d41b7f29d8877da0a9e74c15c Author: Bram Moolenaar <Bram@vim.org> Date: Mon Mar 5 21:59:37 2018 +0100 patch 8.0.1572: Mac: getting memory size doesn't work everywhere Problem: Mac: getting memory size doesn't work everywhere. Solution: Use MACOS_X instead of MACOS_X_DARWIN. (Kazunobu Kuriyama)