Open the Mac OSX Terminal console and:
First: Install Homebrew and make sure it is up to date:
Second: Use these commands to install Ethereum:
brew tap ethereum/ethereum
brew install ethereum
Third: Create a private blockchain:
*Note: At this point the Mac OSX Terminal console will show many real-time log entries. This real-time display of log entries makes it impossible to use the console to enter any additional commands. You will need to open a Geth console.
Fourth: Open a Geth console that won’t display all log entries on screen:
Open a second Mac OSX Terminal console and type:
Fifth: Create a personal account:
From the newly opened Geth console type:
Enter a memorable password.