Hello ,
here is Sam,
 
 i have a macbook Pro 10.7.5 with PD extended ,
i m working with it since a good year, but 
3 weeks ago i got a problem , launching the  PD extended
 
the folder is bouncing in the dock , and in the CPU rate of pd is 90-100% in activity monitor ( Aktivitätsanzeige ), so you have to should pd down immediatly.
already , deleted/reinstalled pd from anew , no results
the Terminal and localhosts should be OK , cause with ,,ping localhost,, , it s like it have to be . and a friend ( working with rasperry pi ) checked my host files too.
 
i reinstalled the ,, lion 10.7.5 mac software ,,  , but still the same problem.
 
now i m thinking about to delete/reinstall my macbook completly , but i m really afraid of this ,,simple,, default 
i don t know what it could be , already asked teachers,friends,FB forum,... but no results
 
has someone an idea,solution ,... 
 
thanks  a lot !!!
 
Sam