SysTools OLM viewer is a free tool to scan, open & preview MS Outlook Mac OLM files. This software quick scan and preview attachment associated with emails. It can scan and load multiple files as in one folder like inbox, sent etc. OLM Viewer also previews meta properties associated with emails and it allows a user to preview and open OLM file of any type such as corrupted or orphaned. This software is compatible with Windows 10 and below versions and it does not require MS Outlook for mac installation. The Tool has a simple and user-friendly interface. The software ensures no data loss of attachments, calendars items, contacts details. Users can try its demo version but the demo version only preview email with the attachment but, licensed version includes different saving file format option and can split output data file. The tool maintains file and folder hierarchy. Either you can view OLM file on Mac machine in Mac Outlook or you can use this tool to view OLM file in Windows. A non-technical user can also use it.