I've recently had this, my old MacBook was 10.5 and upgrading to 10.7 proved difficult due to not being able to find 10.6 (or some such) either way it was complex.
In the end I backed up my old 3GS to the cloud then the new iPhone 5 replicated all the data from there, to this date my 5 has still not been synced with my MacBook and it has not been a problem, the cloud fixes all. (I have just ordered a brand new i7 retina displays book pro though, so there may be some iphone5/MacBook hook ups soon)
In the end I backed up my old 3GS to the cloud then the new iPhone 5 replicated all the data from there, to this date my 5 has still not been synced with my MacBook and it has not been a problem, the cloud fixes all. (I have just ordered a brand new i7 retina displays book pro though, so there may be some iphone5/MacBook hook ups soon)