The SysInspire PST Converter software recovers both English or Non-English Outlook emails, It can recover your mailbox data(emails, contacts, calendar, and appointments) that has been damaged and is capable to convert PST into MBOX, HTML, EML, EMLX, MSG, and ICS, etc. This is a very advanced third-party tool and it has all the advanced features. You can also try the demo version of this software, on which you can convert twenty-five emails from each mailbox.
Read more;-Convert PST into MBOX
You can try BitVare PST to MBOX tool that is for Mac & Windows both OS and capable for unlimited PST files data to MBOX in single round processing. Using it, you can maintains all mail properties & data integrity without any change. Download it and also try its free demo that helps to understand complete working process. Read more >> https://www.bitvare.com/blog/how-to-convert-pst-files-to-mbox-format/
Step 1: Open Microsoft Outlook.
Step 2: Go to File and click on Open & Export.
Step 3: Click the Import/Export button.
Step 4: Select Export to a file and click Next.
Step 5: Click on Personal Folder File(.pst) and then click on Next.
Step 6: Now in the Export Personal Folders, check if Include subfolders are selected. Hence all the file will be exported.
Step 7: Save the exported file and click on Finish.
This exported file will be the required PST file which contains all the emails and other data. Now open Mac iOS and then click open Outlook if it is already available or can download it for free for 30-days to extract the PST file.
Step 1: Open Microsoft Outlook.
Step 2: Choose File and then go to Import.
Step 3: Now select Outlook Data File(.pst) and click Next.
Step 4: Then select Outlook for Windows Data File(.pst) and click Next.
Step 5: Locate the .pst file exported from Windows, select and click Import.
This file will be stored in the Outlook folder. Now Open On My Computer, drag the folder on the desktop and those files will be converted to MBOX format suitable to use in Apple Mail, Mozilla Thunderbird, Netscape, etc.