Mac OLM to Gmail Exporter you can see a live preview of the internal items of OLM before starting the conversion process. It extracts all the important components of the email like To, Bcc, CC, Sent, From, Received, Attachments, etc. This app provides me the capability to save Mac OLM file in the desired location and preview the Gmail account conversion. It also exports the Mac OLM file to Gmail, Outlook, Windows Live Mail etc emails clients.