I can't install solc on Mac OS X. I have tried the following:

npm install solc 

└── [email protected] 
npm WARN enoent ENOENT: no such file or directory, open '/Users/punddalinni/package.json'
npm WARN punddalinni No description
npm WARN punddalinni No repository field.
npm WARN punddalinni No README data
npm WARN punddalinni No license field.

When I go back to geth, and I run

> eth.getCompilers()

When I tried to setSolc the following happened

> admin.setSolc('/Users/punddalinni/node_modules/solc')
exec: "/Users/punddalinni/node_modules/solc": permission denied
    at InvalidResponse (<anonymous>:-81662:-57)
    at send (<anonymous>:-156322:-57)
    at setSolc (<anonymous>:-133322:-57)
    at <anonymous>:1:1

I have tried following the directions here but it gets stuck at

brew install llvm --HEAD --with-clang

EDIT: Including contents of package.json from solc in Mac.

  "_args": [
  "_from": "solc@latest",
  "_id": "[email protected]",
  "_inCache": true,
  "_installable": true,
  "_location": "/solc",
  "_nodeVersion": "4.0.0",
  "_npmOperationalInternal": {
    "host": "packages-13-west.internal.npmjs.com",
    "tmp": "tmp/solc-0.3.0-1.tgz_1457892692634_0.5487515390850604"
  "_npmUser": {
    "email": "[email protected]",
    "name": "d11e9"
  "_npmVersion": "3.3.2",
  "_phantomChildren": {},
  "_requested": {
    "name": "solc",
    "raw": "solc",
    "rawSpec": "",
    "scope": null,
    "spec": "latest",
    "type": "tag"
  "_requiredBy": [
  "_resolved": "https://registry.npmjs.org/solc/-/solc-0.3.0-1.tgz",
  "_shasum": "523e79db0c69070f91fcbf408e8c7d0c93be176c",
  "_shrinkwrap": null,
  "_spec": "solc",
  "_where": "/Users/punddalinni",
  "author": {
    "name": "chriseth"
  "bugs": {
    "url": "https://github.com/chriseth/browser-solidity/issues"
  "dependencies": {},
  "description": "Solidity compiler",
  "devDependencies": {},
  "directories": {},
  "dist": {
    "shasum": "523e79db0c69070f91fcbf408e8c7d0c93be176c",
    "tarball": "http://registry.npmjs.org/solc/-/solc-0.3.0-1.tgz"
  "gitHead": "5ce686c8d33db78c8f1eb8e2318eefbc5151f0eb",
  "homepage": "https://github.com/chriseth/browser-solidity#readme",
  "keywords": [
  "license": "MIT",
  "main": "index.js",
  "maintainers": [
      "name": "chriseth",
      "email": "[email protected]"
      "name": "d11e9",
      "email": "[email protected]"
  "name": "solc",
  "optionalDependencies": {},
  "readme": "ERROR: No README data found!",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/chriseth/browser-solidity.git"
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  "version": "0.3.0-1"

Any ideas?

2 Answers 2


I wasn't familiar with NPM, so had some similar issues. Simply running npm install solc will attempt to install locally, which can present some permission and linking issues- this is likely the cause of the problem.

Instead, install solC globally by using $ npm install -g solc (you may also want to try $ npm install solc --global as I'm not sure which of these two commands fixed my issue).

If this is installed, check where it's been installed by running $ which solcjs which should yield something like /usr/local/bin/solcjs

I found that I needed to also use Homebrew to install/build solC, following the installation instructions. Once Brew was done, I checked that solC was installed with $ which sol.

Copy this directory, then once you've launched geth console use it in the setSolc command, like > admin.setSolc("/usr/local/bin/solc")

With luck, you'll get a confirmation message, and the next time your run > eth.getCompilers() the result should be something like ["Solidity"]


Ah...you are using this wrong. Web3 tutorials don't reflect this but there is a difference between the way you set up Solidity to compile on web3 with the built from source compiler (which is what web3 assumes) and the npm package (which the tutorials don't revolve around). In order to get things compiling, you'll need to follow the instructions per the Browser-solidity page:



var solc = require('solc');
var input = "contract x { function g() {} }";
var output = solc.compile(input, 1); // 1 activates the optimiser

for (var contractName in output.contracts) {
    // code and ABI that are needed by web3
    console.log(contractName + ': ' + output.contracts[contractName].bytecode);
    console.log(contractName + '; ' + JSON.parse( output.contracts[contractName].interface));
  • I tried running that from inside geth but get this > var solc = require('solc'); Cannot find module 'solc' at a (<anonymous>:-160:-28) at require (<anonymous>:-122:-28) at <anonymous>:1:12 Also, is this a OS X issue? Because I also use an Ubuntu testchain and to compile contracts there I simply follow the usual steps, as described here (setting source = minifiedContract, etc.) Commented Mar 28, 2016 at 22:00
  • Nope. Not an issue that we're aware about in either. Can you list the contents of your package.json?
    – VoR0220
    Commented Mar 29, 2016 at 0:41
  • Added it to the question. Commented Mar 29, 2016 at 12:39
  • No, not the solc package.json, your personal package.json, the one where you're creating the project out of.
    – VoR0220
    Commented Mar 29, 2016 at 18:15
  • Sorry, but I'm new at this am I don't think I'm understanding what you're saying. Which directory should that be in? Commented Mar 30, 2016 at 11:53

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