To convert OLM to pst you may use manual method but sometime manual get failed to convert all olm data into pst so in this situation i want you to use this OLM to PST converter software which is very Effective software Convert Mac OLM File to PST.
With this software you can easily fix the corrupt OLM file and recover all the important mailbox data, such as journals, contacts, emails, calendar, journal, etc and convert them into PST file.
It completely scans the files recovers maximum amount of data and ensures total data integrity after migrating the data from OLM files to PST files. After conversion, the software preserves original formatting, structure, Meta data, read/unread status etc. of complete mailbox.
Use its free demo version which allow the user to see the preview of all convertible data and ensure the user about it function and features. This software is very reliable anyone can use this software without any technical skill.