Installing Vectorworks 2014 viewer allows me to open my VW2010 files... So I can at least print them or make a PDF out of them.
However having paid around what 1500$ ? for a software that doesn't run after 3 years is insulting, to say the least. Whoever's fault it is.
Archicad14 (released 2010) runs on Mavericks... Even other smaller companies have released or are planning to release compatible versions of their software.
For my part I have moved on to Autocad for Mac. But I have still paid good money for VW and can't even use it as is to edit my 2 year old drawings. It's a shame and (although I think it's usability is superior to that of Autocad) I will not recommend the use of Vectorworks to anyone in my field of work.