What's the easiest way to free up disk space on my iMac with a huge photo library?

Solution 1:

Assuming your NAS is always available and connected to your iMac, you can move both iPhoto and iTunes libraries to the NAS and use

  • symbolic links from ~/Pictures and ~/Music to fool the applications
  • start the application with Option pressed to select the alternative location
  • iTunes: select alternative storage location in Options
  • iPhoto: start by double-clicking moved library file