iPhoto not launching after upgrade to Yosemite, I don't know how to execute the fix I migrated a MacBook pro to a new iMac with Yosemite.  I then upgraded iPhoto to v 9.6, and when I try to launch iPhoto, it does not launch, stating: iPhoto cannot be opened because of a problem. 

I found the fix to the problem on a related question on this site that references: http://www.sanebutdifferent.com/iphoto-11-nyxaudioanalysis-crash-error

This appears to address my issue, based on the error report.  I've downloaded the replacement file, but I don't know where to put it.  I don't seem to have a /library folder. Where should I be looking?  Finder will not let me create a /library folder either.
I'm not sure whether that is a true fix or not - however, that file doesn't actually reside in /Library/Frameworks/ it is symlinked from /System/Library/PrivateFrameworks/NyxAudioAnalysis.framework
to
/Library/Frameworks/NyxAudioAnalysis.framework

You would need to replace the original, not the symlink 



The simplest way to get there is…


switch to Finder
 Cmd ⌘   N   for new window
 Cmd ⌘   Shift ⇧   G  for Go to…
Copy/paste /System/Library/PrivateFrameworks/ 
Hit Enter
drag the file in [you might want to copy the original to the desktop first, just in case]
click 'replace'