well you're in the right place, sort of. you put this in the 'Apple Rumors and Reports' forum. People that read this are looking for news stories and links, not 'i need help' questions.
This thread will be moved soon by a moderator. You should have posted in the 'APple Laptops' or the 'Switcher Hangout'
As for your possible 'common problem' of not syncing, there isn't a lot anybody on here can do other than saying to make sure its all plugged in.
UNLESS you provide us with your MacBook's, iTunes, and iPhones information.
Start by looking in the upper left of your MacBook's screen, click the apple.. then about this mac... then more info... then type the general information thats there.. example
Macbook
13 inch, mid 2009
Processor 3.06 GHz Intel Core i3
Memory 8 GB 1333 MHz DDR3
Software Mac OS X Lion 10.7 (11A511)
That info should be enough on the macbook side, then figure out what edition of iTunes you have. Open iTunes, click the word iTunes on the top left and hit about iTunes and then you'll see something like 9.1 or 10.4 for my self.
Then your iPhone.. go to the settings app.. and then find the general tab.. and then the about tab.. Find your version on that list, it will be something like 4.3.X.. mine is 4.3.4 for instance.
And then, describe the issue more in depth, have you owned this Mac for years and this is your status quo? Has it just started recently? Did it sync you iPhone up until a certain action (you bought Lion, you downloaded an update for iTunes or your iPhone).
Once you do those things, somebody that knows a lot more than i do will be able to help hopefully. Like i said, all we can say as of right now is 'Are the chords plugged in the right holes, and all the way in said hole.'
good luck