Are you looking for the simplest method to convert PST file to Thunderbird mac? Try MacArmy PST Converter for Mac that assists users to directly import PST files to other various saving options i.e. HTML, OLM, EML, MBOX, etc. in bulk at once. It provides the dual options to load the PST files/folders and save the resultant output in the desired location path. There is no need to install the outlook editions for the conversion process. It keeps the accurate PST file folder layout during the conversion process. It provides the trial version that permits to convert first 25 PST files for free.