Import from Evernote as enex

Apologies in advance for such a simple question. Looking to migrate from OneNote and have exported as both a zip and enex file which took around four days on a Mac using the export tool from the welcome pages. OneNote Export
I left the import tool on Joplin 2.8.8 (prod, darwin) running for nearly one week without any import taking place when I finally gave up and ended the process. When I look at the enex file it is only 9k.
Is my issue that I'm on Mac or am I missing part of the process. Grateful for any helpful pointers. GT