How to download and setup catapult-client
Open terminal and run command
                                            git clone https://github.com/symbol/catapult-client.git
                                        
                                        git clone is used to create a copy or clone of catapult-client repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with catapult-client https://github.com/symbol/catapult-client/archive/master.zip
Or simply clone catapult-client with SSH
                                            [email protected]:symbol/catapult-client.git                                    
                                    If you have some problems with catapult-client
You may open issue on catapult-client support forum (system) here: https://github.com/symbol/catapult-client/issuesSimilar to catapult-client repositories
Here you may see catapult-client alternatives and analogs
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