I am trying to install and use the Mix IDE. I have downloaded the disk image from the github page (https://github.com/ethereum/webthree-umbrella/releases/tag/v1.2.3). There appears to be no issue when I download the .dmg or move it into my Applications folder. However, when I try to open Mix (or AlethOne or AlethZero for that matter), I get a message that "Mix quit unexpectedly." I have tried installing a previous version of Mix, but I got the same result.

Are there any dependencies I need to install before hand? Or some other concern I should be aware of? Any help would be greatly appreciated!

I am running OS X 10.10.5 (Yosemite) on a MacBook Pro

2 Answers 2



  1. Install Brew

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

  1. Run brew doctor
  2. Install the caktux formulae for Ethereum

brew tap ethereum/ethereum

  1. brew install cpp-ethereum --devel --with-gui --successful

  2. brew linkapps cpp-ethereum

  • Thank you for your help! I completed the steps you described and got messages that ethereum was already installed. I re-downloaded Mix, AlethZero and AlethOne from the github, as I didn't know how to start the application otherwise - and I got the same issue as before. Is there a different step I should take to start the application? Or perhaps do I need to do a more thorough uninstall first? Thank you again
    – John
    Apr 12, 2016 at 1:26
  • Try to uninstall first and then install :) Apr 12, 2016 at 5:03
  • Thank you again - I haven't forgotten about your response/to accept, I'm still working through getting it to work though, I've run into a bunch of issues getting the brew install to work, so working my way through all the forum posts I can find on each issue in succession
    – John
    Apr 15, 2016 at 2:49
  • Finally got it! I kept getting errors when running those commands above, and tried a few things to resolve them - installing libjson-rpc, and the last blocker was that I needed to update my XCode, which updated the version of clang on my machine. Thanks again!
    – John
    Apr 23, 2016 at 16:15

Worth mentioning as well that for those living on the cutting edge and using the develop ppa of cpp-ethereum: Mix will no longer be installable by apt-get install mix - to avoid a naming conflict with the build tool of elixir that is also named mix, we renamed mix to mix-ide, so to install it, use

apt-get install mix-ide

instead of mix.

See - https://www.reddit.com/r/ethereum/comments/4e9wv1/ubuntu_develop_mix_renamed_to_mixide/


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