You can easily Save Hotmail Email files using MacUncle Hotmail Backup Tool. The tool supports Mac OS Machines.
Enter the Hotmail Account credentials to the software Panel. And hit Login button to process.
Select the email folder to convert and choose the respective format from PST, EML, MBOX, HTML, MHT, CSV, OLM, Thunderbird, IMAP, etc.
Click on the browse button in order to store the resultant file in the required location else save the file in default location - Desktop.