Unpacking by clicking the Flow file exported from Flowdock results in : Error 1 - Operation not permitted

Document ID : KB000121241
Last Modified Date : 15/11/2018
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Unpacking exported Flow file from Flowdock on MAC results in :

Unable to expand "<flow_name>-<date>.zip" into "<folder_name>". (Error 1 - Operation not permitted.)
Open MAC Terminal and type : 

unzip <name_of_the_zip_file>