Outlook Express does not support any update windows. Currently, I updated my Windows in Windows 10. Only MS Outlook Email Supported in window 10. I have a lot of important DBX file how I convert my DBX file in PST format. 

The manual method is available in the market but this method long process way to convert .eml to .pst file format. As well as he converts step by step and only Its convert one file in one time. If you know about the short method and which convert all file in one time that you know please mention here.

Outlook exports its emails in OLM format. However, this file format is not well received by Apple Mail. At this, you will need the help of a tool that can help you import olm files to mac mail format. In fact, there are several tools in the market that offer this task. I have been helped by Gladwev’s products in the past in more than one instances. Take a free trial of OLM Converter Pro before purchasing it.