I follow this guide for installation (on Mac) https://hyperledger.github.io/composer/latest/installing/development-tools.html#appendix
and this one for developing a business network https://hyperledger.github.io/composer/v0.16/tutorials/developer-tutorial
everything is fine, unless when I shutdown the computer, the composer seems to be uninstalled!! Mac's terminal does not recognize composer commands and I have to uninstall and install all them again! Can you give your idea about what the cause is? Thanks