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+OSX:
+
+sudo npm install -g grunt-cli
+sudo npm install -g nw-gyp
+
+
+To build new native modules for new NWJS:
+
+grunt exec:powbuild
+
+rm -rf native/osx64/node_modules/bindings
+rm -rf native/osx64/node_modules/raiblocks-pow
+cp -a node_modules/bindings native/osx64/node_modules/
+cp -a node_modules/raiblocks-pow native/osx64/node_modules/
+