Which format are importable by MM Version 11.2.124 for MAC
I have no clue what file formats you are looking for but...
In the release notes of MindManager for MAC version 12 I found this for you. (NOTE version 11.2.124 for Mac is really old)
Users can now import existing XMind & FreeMind maps into MindManager. Imports enable users toevolve and improve on the content created in other mapping applications leveraging the breadth ofMindManager tools and features.• XMind Import• FreeMind Import
Maybe you find more if you just look for the import options in your Help.