How to sync app on iphone after reinstalling mac OS X

Hello, I had to reinstall the whole system Mac OS. Now, Itunes doesn't allow me to sync applications I have bought on my iphone. Canno't even restore the iphone. How to do to to make it work again ? Thank's.
Message was edited by: Michael Salama
Message was edited by: Michael

You can't restore your iPhone with iTunes?
What happens when you select Restore - any error message provided?
Have you reauthorized your computer with your iTunes account with iTunes - the same iTunes account used to purchase or acquire content from the iTunes store including apps?
If the apps will not transfer from your iPhone to your iTunes library and you don't maintain a backup of your iTunes library stored on an external drive or some other media used for backup purposes, you can re-download all apps from the app store and you will not be charged for any apps you have already purchased as long as you do this with the same iTunes account that was used to purchase the apps.

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dcjsail wrote:
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I still have an old 3G which I use mostly as a ipod/radio. By accident I found you can overide the i-tunes block.
1. Select Apps in Apps store icon on the phone.
2. Choose App to download
3. At "Instal" button press it QUICKLY in blocks of 3 presses, keep doing this until it overides the i-tune warning, then if there were legacy versions for os 4.2.1 it says something like "this app is for os 5 or above", but gives you a choice to download an older version. Select this.
Sometimes it says the Apps is for newer hardware, requiring motion sensors, front camera's etc.. just got to accept these ones don't work on legacy hardware.
4. Download does not work for all Apps, esp. newer ones written after os 4.21 or if the developer doesn't have the vintage apps archived- e.g. Instagram downloads, but won't run (wants to update), or WSJ and Barrons stalls and goes through a download loop.
I am not making this up, as I bought this old 3g unit on e-bay, after a complete factory reset I now have:
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Some Apps will download ok, and then at activation says its too old and no longer supported e.g Whats App.
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How to sync app on iphone after reinstalling mac OS X

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