after installation, get this error on Mac

[zhangjiannan]

naivechain/main.js:11 class Block { ^^^^^ SyntaxError: Unexpected reserved word at Module._compile (module.js:439:25) at Object.Module._extensions..js (module.js:474:10) at Module.load (module.js:356:32) at Function.Module._load (module.js:312:12) at Function.Module.runMain (module.js:497:10) at startup (node.js:119:16) at node.js:906:3

npm ERR! naivechain@1.0.0 start: node main.js npm ERR! Exit status 8 npm ERR! npm ERR! Failed at the naivechain@1.0.0 start script. npm ERR! This is most likely a problem with the naivechain package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! node main.js npm ERR! You can get their info via: npm ERR! npm owner ls naivechain npm ERR! There is likely additional logging output above. npm ERR! System Darwin 15.6.0 npm ERR! command "node" "/usr/local/bin/npm" "start" npm ERR! cwd /naivechain npm ERR! node -v v0.10.28 npm ERR! npm -v 1.4.9 npm ERR! code ELIFECYCLE npm ERR! npm ERR! Additional logging details can be found in: npm ERR! naivechain/npm-debug.log npm ERR! not ok code 0

[pannous]

node -v v0.10.28 ? add 4 to that

[TSavo]

Yeah, upgrade your node or use babel.

[gentleKun]

Your node version is too low.