I upgraded to the iPhone 4S this past Saturday and have a good friend who wants to buy my “old” iPhone 3GS. So I backed up my old phone, saved all of my photos, synced my music, calendar, contact, upgraded to iCloud, etc. I thought I was set. Once I synced my new iPhone 4S, I wanted to send my wife a text message and quickly realized that my text message history was non-existent. After doing some quick research, I learned where to find the backup files in OS X for your iPhone (which also contains text/SMS history).
To find your ‘Library’ folder in OS X, do the following simple step:
While in Finder, click ‘Go’ in the top menu and then press the ‘option’ key. You will see ‘Library’ magically appear. I’m not sure if this is Lion specific.