You can easily import Mac OLM file to Gmail using Third-party software like  KDETools OLM Converter. With this software, users can easily transfer single and large OLM files to Gmail Migrate with batch conversion. Users can save data in other file formats like EML, EMLX, MBOX, MSG, HTML etc. This Application shows a free preview of the OLM mail with attachment. OLM to Gmail Migration tool operates with all the Windows Version.