Vincent, sorry for the delay to answer you.
We usually don't use the tickets system for support - that is made at Wings3D's forum: http://www.wings3d.com/forum/
Anyway, the minimal requirement to v2.2.5 is OSX 10.12 - Sierra - in accord with the download page: http://www.wings3d.com/?page_id=84 - so, sorry but it may really not work in your OS.
Best regards
Micheus
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Vincent, sorry for the delay to answer you.
We usually don't use the tickets system for support - that is made at Wings3D's forum: http://www.wings3d.com/forum/
Anyway, the minimal requirement to v2.2.5 is OSX 10.12 - Sierra - in accord with the download page: http://www.wings3d.com/?page_id=84 - so, sorry but it may really not work in your OS.
Best regards
Micheus