To Convert Mac OLM to PST format you can use ToolsGround OLM to PST Converter Software which can easily convert Mac OLM files into Outlook PST file format.
Use ToolsGround MBOX to PST Converter software, which is the most, suggested software to transfer MBOX file into Outlook PST file format. It is an application which promptly exports MBOX data into Outlook format without any data loss.