IOS updates always fail on one Mac, but succeed on another

Question

Hi,
unfortunately there is no general iOS subforum, so I post it here in the iPad forum in hope that someone has an idea.
Whenever I am trying to update one of my iDevices from my Mac Pro (10.6.4 and iTunes 9 or 10, both have the same problem) the update runs half way through and then gets stuck on the apple logo, progress bar at about half way through.
This is reproducable with any iDevice (tried iPhone 4, iPhone 3G and iPad).
If I plug the same devices into my Macbook Pro, the update (or then: restore) works without any glitches.
So it must be something with my Mac Pro, but I have no idea what might cause this.
Has anyone else experienced something like this before?
Thanks
Sascha

Answer 1

HI,
So it must be something with my Mac Pro
Boot from install disc, run Disk Utility in case the startup disk needs repairing and check for free disk space.
Insert your install disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu and launch Disk Utility.
(In Mac OS X 10.4 or later, you must select your language first from the installer menu)
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
When you are finished with DU, from the Menu Bar, select Utilities/Startup Manager.
Select your start up disk and click Restart
While you have the Disk Utility window open, look at the bottom of the window. Where you see Capacity and Available. Make sure there is always 15% free space.
Carolyn