How to download and setup heic-convert
Open terminal and run command
                                            git clone https://github.com/tobiaswadseth/heic-convert.git
                                        
                                        git clone is used to create a copy or clone of heic-convert 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 heic-convert https://github.com/tobiaswadseth/heic-convert/archive/master.zip
Or simply clone heic-convert with SSH
                                            [email protected]:tobiaswadseth/heic-convert.git                                    
                                    If you have some problems with heic-convert
You may open issue on heic-convert support forum (system) here: https://github.com/tobiaswadseth/heic-convert/issuesSimilar to heic-convert repositories
Here you may see heic-convert alternatives and analogs
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