I won't go deep into details and just say that it is something like SCSI commands used over IP network. ISCSI is a protocol that allows sharing data via LANs, WANs and Internet. What is iSCSI Initiator and iSCSI Target? What is iSCSI Initiator? Why do you really need it? Where to get and how to use iSCSI Initiator for Mac? Let's start! 1. I would like to answer several questions about iSCSI which you were too embarrassed to ask. The client software for this standard is even embedded in Windows 7, however still there is no default iSCSI Initiator for Mac. ISCSI has become extremely popular in recent years, and so more and more people enjoy the numerous advantages of the easy network sharing.