i´ve been using bias peak for ages.in fact i´ve a dedicated computer installed with it to edit my soundfiles: clean, solid, easy and has some features i miss on some editors (the same happened to me with soundedit16…i loved that app)
bought a new computer last year, emailed earl from soundness llc, and installed peak 7 running el capistan… i followed his instructions, the app opened ok and aparently everything was fine…until i opened some light-weighted fx, then peak started crashing/freezing day after day…and showing that “processor overload”- like msg 
anyone here using peak under el capistan or sierra successfully?
i´ve tried some editors in the past, like amadeus, wave editor, etc…and finally bought dsp-quattro.
…but i´d like to give a try to resample